VegeWorx Plant Index - Letter I
- Ibapah Springparsley - Cymopterus Ibapensis M.E. Jones
- Ibapah Tickweed - Hackelia Ibapensis L.M. Shultz & J.S. Shultz
- Ibatia Maritima (Jacq.) Decne.
- Iberian Geranium - Geranium Ibericum Cav.
- Iberian Knapweed - Centaurea Iberica Trevir. ex Spreng.
- Iberian Spiderflower - Cleome Iberica DC.
- Iberian Spirea - Spiraea Hypericifolia L.
- Iberis Candicans Raf.
- Iberis Nudicaulis L.
- Iberis Pruitii Tineo
- Ibervillea Tenella (Naud.) Small
- Ibervillea Tripartita (Naud.) Greene
- Ibex Buckwheat - Eriogonum Ammophilum Reveal
- Ibidium Beckii (Lindl.) House
- Ibidium Cernuum (L.) House
- Ibidium Floridanum Wherry
- Ibidium Gracile (Bigelow) House
- Ibidium Laciniatum (Small) House
- Ibidium Longilabre (Lindl.) House
- Ibidium Ovale (Lindl.) House
- Ibidium Plantagineum (Raf.) House
- Ibidium Praecox (Walter) House
- Ibidium Strictum (Rydb.) House
- Ibidium Tortile (Sw.) House
- Ibidium Vernale (Engelm. & A. Gray) House
- Ibidium ×intermedium (Ames) House
- Icacina - Icacina A. Juss.
- Icacorea Glauciflora (Urb.) Britton
- Icacorea Guadalupensis (Duchassaing ex Griseb.) Britton
- Icacorea Luquillensis Britton
- Icacorea Paniculata (Nutt.) Sudw.
- Ice Cold Buttercup - Ranunculus Karelinii Czern.
- Icecream Bean - Inga Ingoides (Rich.) Willd.
- Icecreambean - Inga Edulis Mart.
- Icegrass - Phippsia (trin.) R. Br.
- Icegrass - Phippsia Algida (Sol.) R. Br.
- Icelandic Poppy - Papaver Nudicaule L.
- Icelandic Poppy - Papaver Nudicaule L. ssp. americanum Rändel ex D.F. Murray
- Icelandic Poppy - Papaver Nudicaule L. ssp. nudicaule
- Iceplant - Mesembryanthemum L.
- Ichnanthus Axillaris (Nees) Hitchc. & Chase
- Ichthyomethia Piscipula (L.) Hitchc. ex Sarg.
- Idaho Balsamroot - Balsamorhiza Hookeri (Hook.) Nutt. var. idahoensis (Sharp) Cronquist
- Idaho Barren Strawberry - Waldsteinia Idahoensis Piper
- Idaho Beardtongue - Penstemon Idahoensis N.D. Atwood & S.L. Welsh
- Idaho Bellflower - Campanula Parryi A. Gray var. idahoensis McVaugh
- Idaho Bentgrass - Agrostis Idahoensis Nash
- Idaho Biscuitroot - Lomatium Idahoense Mathias & Constance
- Idaho Bladderpod - Lesquerella Carinata Rollins
- Idaho Bladderpod - Lesquerella Carinata Rollins var. carinata
- Idaho Bladderpod - Lesquerella Carinata Rollins var. languida Rollins
- Idaho Blue-eyed Grass - Sisyrinchium Idahoense E.P. Bicknell
- Idaho Blue-eyed Grass - Sisyrinchium Idahoense E.P. Bicknell var. idahoense
- Idaho Blue-eyed Grass - Sisyrinchium Idahoense E.P. Bicknell var. occidentale (E.P. Bicknell) Douglass M. Hend.
- Idaho Blue-eyed Grass - Sisyrinchium Idahoense E.P. Bicknell var. segetum (E.P. Bicknell) Douglass M. Hend.
- Idaho Bluebells - Mertensia Campanulata A. Nelson
- Idaho Buttercup - Ranunculus Uncinatus D. Don ex G. Don var. parviflorus (Torr.) L.D. Benson
- Idaho Dwarf-primrose - Douglasia Idahoensis Douglass M. Hend.
- Idaho Esslingeriana Lichen - Esslingeriana Idahoensis (Essl.) Hale & M.J. Lai
- Idaho Fescue - Festuca Idahoensis Elmer
- Idaho Fescue - Festuca Idahoensis Elmer ssp. idahoensis
- Idaho Fleabane - Erigeron Asperugineus (D.C. Eaton) A. Gray
- Idaho Frasera - Frasera Albicaulis Douglas ex Griseb. var. idahoensis (H. St. John) C.L. Hitchc.
- Idaho Goldenweed - Tonestus Aberrans (A. Nelson) G.L. Nesom & D. Morgan
- Idaho Goldthread - Coptis Occidentalis (Nutt.) Torr. & A. Gray
- Idaho Gooseberry - Ribes Oxyacanthoides L. ssp. irriguum (Douglas) Sinnott
- Idaho Gumweed - Grindelia Nana Nutt.
- Idaho Gumweed - Grindelia Nana Nutt. var. integerrima (Rydb.) Steyerm.
- Idaho Gumweed - Grindelia Nana Nutt. var. nana
- Idaho Hawksbeard - Crepis Bakeri Greene ssp. idahoensis Babc. & Stebbins
- Idaho Hymenopappus - Hymenopappus Filifolius Hook. var. idahoensis B.L. Turner
- Idaho Kittentails - Synthyris Platycarpa Gail & Pennell
- Idaho Licorice-root - Ligusticum Tenuifolium S. Watson
- Idaho Milkvetch - Astragalus Conjunctus S. Watson
- Idaho Milkvetch - Astragalus Conjunctus S. Watson var. conjunctus
- Idaho Milkvetch - Astragalus Conjunctus S. Watson var. rickardii S.L. Welsh, K. Beck & F. Caplow
- Idaho Pennycress - Noccaea Fendleri (A. Gray) Holub ssp. idahoensis (Payson) Al-Shehbaz & M. Koch
- Idaho Pepperweed - Lepidium Papilliferum (L.F. Hend.) A. Nelson & J.F. Macbr.
- Idaho Phacelia - Phacelia Idahoensis L.F. Hend.
- Idaho Saxifrage - Saxifraga Idahoensis Piper
- Idaho Sedge - Carex Idahoa L.H. Bailey
- Idaho Springbeauty - Claytonia Lanceolata Pall. ex Pursh var. idahoensis R.J. Davis
- Idaho Stonecrop - Sedum Valens Björk
- Idaho Trillium - Trillium Petiolatum Pursh
- Idaho Twinpod - Physaria Didymocarpa (Hook.) A. Gray var. lyrata C.L. Hitchc.
- Idaho Xanthoparmelia Lichen - Xanthoparmelia Idahoensis Hale
- Idahoa - Idahoa A. Nelson & J.F. Macbr.
- Idesia - Idesia Maxim.
- Idesia - Idesia Polycarpa Maxim.
- Idria Buckwheat - Eriogonum Vestitum J.T. Howell
- Ifil - Intsia Bijuga (Colebr.) Kuntze
- Igniar's Dotted Lichen - Bacidia Igniarii (Nyl.) Oksner
- Iguana Hackberry - Celtis Iguanaea (Jacq.) Sarg.
- Iguanatail - Sansevieria Hyacinthoides (L.) Druce
- Ilama - Annona Diversifolia Saff.
- Ilang-ilang - Cananga (dc.) Hook. f. & Thomson
- Ilang-ilang - Cananga Odorata (Lam.) Hook. f. & Thomson
- Ilex Ambigua (Michx.) Torr. var. montana (Torr. & A. Gray ex A. Gray) H.E. Ah
- Ilex Ambigua (Michx.) Torr. var. monticola (A. Gray) Wunderlin & Poppleton
- Ilex Amelanchier M.A. Curtis ex Chapm. var. monticola (A. Gray) Alph. Wood
- Ilex Arenicola Ashe
- Ilex Beadlei Ashe
- Ilex Bronxensis Britton
- Ilex Buergeri Miq.
- Ilex Buswellii Small
- Ilex Caroliniana Trel. ex Small
- Ilex Cassine L. var. myrtifolia (Walter) Sarg.
- Ilex Cornuta Lindl. & Paxton var. burfordii De France
- Ilex Crenata Thunb. var. paludosa (Nakai) H. Hara
- Ilex Cumulicola Small
- Ilex Curtissii (Fernald) Small
- Ilex Decidua Walter var. curtissii Fernald
- Ilex Decidua Walter var. longipes (Chapm. ex Trel.) H.E. Ahles
- Ilex Fastigiata E.P. Bicknell
- Ilex Goshiensis Hayata
- Ilex Hexandra Bello [excluded]
- Ilex Longipes Chapm. ex Trel. var. hirsuta Lundell
- Ilex Montana Torr. & A. Gray ex A. Gray var. beadlei (Ashe) Fernald
- Ilex Montana Torr. & A. Gray ex A. Gray var. mollis (A. Gray) Britton
- Ilex Monticola A. Gray
- Ilex Paraguayensis A. St.-Hil., orth. var.
- Ilex Pedunculosa Miq.
- Ilex Pygmaea McFarlin
- Ilex Riedlaei Loes.
- Ilex Sintenisii (Urb.) Britton
- Ilex Sugerokii Maxim.
- Ilex Urbaniana Loes. var. riedlaei (Loes.) Edwin
- Ilex Verticillata (L.) A. Gray var. cyclophylla B.L. Rob.
- Ilex Verticillata (L.) A. Gray var. fastigiata (E.P. Bicknell) Fernald
- Ilex Verticillata (L.) A. Gray var. padifolia (Willd.) Torr. & A. Gray ex S. Watso
- Ilex Verticillata (L.) A. Gray var. tenuifolia (Torr.) S. Watson
- Iliamna Acerifolia (Nutt. ex Torr. & A. Gray) Greene
- Iliamna Angulata Greene
- Iliamna Corei Sherff
- Iliamna Remota Greene
- Iliau - Wilkesia A. Gray
- Iliau - Wilkesia Gymnoxiphium A. Gray
- Illecebrum Densum Humb. & Bonpl. ex Schult.
- Illinois Bundleflower - Desmanthus Illinoensis (Michx.) MacMill. ex B.L. Rob. & Fernald
- Illinois Dewberry - Rubus Centralis L.H. Bailey
- Illinois Flatsedge - Cyperus Grayoides Mohlenbr.
- Illinois Greenbrier - Smilax Illinoensis Mangaly
- Illinois Hawthorn - Crataegus Prona Ashe
- Illinois Horse-gentian - Triosteum Aurantiacum E.P. Bicknell var. illinoense (Wiegand) Palmer & Steyerm.
- Illinois Pinweed - Lechea Racemulosa Michx.
- Illinois Pondweed - Potamogeton Illinoensis Morong
- Illinois Ticktrefoil - Desmodium Illinoense A. Gray
- Illinois Wart Lichen - Verrucaria Illinoisensis Servit
- Illinois Woodsorrel - Oxalis Illinoensis Schwegm.
- Illosporium Corallinum Roberge
- Illosporium Lichen - Illosporium Carneum Fr.
- Illosporium Lichen - Illosporium Mart.
- Illscented Wakerobin - Trillium Rugelii Rendle
- Illyrian Cottonthistle - Onopordum Illyricum L.
- Ilysanthes Anagallidea (Michx.) B.L. Rob.
- Ilysanthes Attenuata (Spreng.) Small
- Ilysanthes Dubia (L.) Barnhart
- Ilysanthes Grandiflora (Nutt.) Benth.
- Ilysanthes Inequalis (Walter) Pennell
- Ilysanthes Monticola (Muhl. ex Nutt.) Raf.
- Ilysanthes Saxicola (M.A. Curtis) Chapm.
- Imberis Woodyaster - Xylorhiza Tortifolia (Torr. & A. Gray) Greene var. imberbis (Cronquist) T.J. Watson
- Imbricate Lorentziella Moss - Lorentziella Imbricata (Mitt.) Broth.
- Imbricate Phacelia - Phacelia Imbricata Greene
- Imbricate Phacelia - Phacelia Imbricata Greene ssp. imbricata
- Imbricate Phacelia - Phacelia Imbricata Greene ssp. patula (Brand) Heckard
- Imbricate Wattle - Acacia Imbricata F. Muell.
- Imbricate Wreath Lichen - Phaeophyscia Imbricata (Vain.) Essl.
- Imbu - Spondias Tuberosa Arruda ex Koster
- Immersaria Lichen - Immersaria Carbonoidea (J.W. Thomson) Esnault & Roux
- Immersaria Lichen - Immersaria Rambold & Pietschmann
- Immersed Clauzadea Lichen - Clauzadea Immersa (Hoffm.) Hafellner & Bellem.
- Immersed Physcomitrium Moss - Physcomitrium Immersum Sull.
- Impatiens Biflora Walter
- Impatiens Ecalcarata Blank., nom. illeg.
- Impatiens Fulva Nutt.
- Impatiens Noli-tangere L. ssp. biflora (Walter) Hultén
- Impatiens Nortonii Rydb.
- Impatiens Occidentalis Rydb.
- Impatiens Oliveri C. Wright ex W. Watson
- Impatiens Petersiana Gilg. ex Grignan
- Impatiens Roylei Walp.
- Impatiens Sultani Hook. f.
- Imperata Arundinacea Cirillo
- Imperata Conferta (J. Presl) Ohwi
- Imperata Hookeri (Rupr. ex Andersson) Rupr. ex Hack.
- Imperatoria Ostruthia L.
- Imperfect Buckwheat - Eriogonum Mancum Rydb.
- Imperial Fritillary - Fritillaria Imperialis L. [excluded]
- Imshaug's Disc Lichen - Buellia Imshaugii Hafellner
- Imshaug's Rim Lichen - Lecanora Imshaugii Brodo
- Imshaug's Tube Lichen - Hypogymnia Imshaugii Krog
- Imshaug's Witch's Hair Lichen - Alectoria Imshaugii Brodo & D. Hawksw.
- Imshaugia Lichen - Imshaugia Aleurites (Ach.) S.L.F. Mey.
- Imshaugia Lichen - Imshaugia Placorodia (Ach.) S.L.F. Mey.
- Imshaugia Lichen - Imshaugia S.l.f. Mey.
- Inactive Tube Lichen - Hypogymnia Inactiva (Krog) Ohlsson
- Incarvillea Delavayi Bureau & Franch.
- Incarvillea - Incarvillea Juss.
- Incarvillea Olgae Regel
- Incense Cedar - Calocedrus Decurrens (Torr.) Florin
- Incense Cedar - Calocedrus Kurz
- Incense Cedar Mistletoe - Phoradendron Libocedri (Engelm.) Howell
- Inchhigh Lupine - Lupinus Uncialis S. Watson
- Inchplant - Tradescantia Zebrina hort. ex Bosse
- Incised Agrimony - Agrimonia Incisa Torr. & A. Gray
- Incised Fumewort - Corydalis Incisa (Thunb.) Pers.
- Incised Halberd Fern - Tectaria Incisa Cav.
- Incline Distichium Moss - Distichium Inclinatum (Hedw.) Bruch & Schimp.
- Incomplete Syrrhopodon Moss - Syrrhopodon Incompletus Schwägr.
- Inconspicuous Pea - Lathyrus Inconspicuus L.
- Indian Acalypha - Acalypha Indica L.
- Indian Aconite - Aconitum Ferox Wall. ex Ser.
- Indian Albizia - Albizia Lebbekoides (DC.) Benth.
- Indian Anoda - Anoda Abutiloides A. Gray
- Indian Aster - Kalimeris Indica (L.) Sch. Bip.
- Indian Bael - Aegle Marmelos (L.) Corr. Serr.
- Indian Banyan - Ficus Benghalensis L.
- Indian Bark - Cinnamomum Tamala (Buch.-Ham.) T. Nees & Eberm.
- Indian Biscuitroot - Lomatium Piperi J.M. Coult. & Rose
- Indian Blanket - Gaillardia Pulchella Foug.
- Indian Blanket - Gaillardia Pulchella Foug. var. australis Turner & M.A. Whalen
- Indian Blanket - Gaillardia Pulchella Foug. var. picta (D. Don) A. Gray
- Indian Blanket - Gaillardia Pulchella Foug. var. pulchella
- Indian Bowstring Hemp - Sansevieria Roxburghiana Schult. & Schult. f.
- Indian Breadroot - Pediomelum Rydb.
- Indian Camphorweed - Pluchea Indica (L.) Less.
- Indian Canyon Fleabane - Erigeron Untermannii S.L. Welsh & Goodrich
- Indian Canyon Twinpod - Physaria Repanda Rollins
- Indian Crabgrass - Digitaria Longiflora (Retz.) Pers.
- Indian Cucumber - Medeola L.
- Indian Cucumber - Medeola Virginiana L.
- Indian Flatsedge - Cyperus Nanus Willd.
- Indian Flatsedge - Cyperus Nanus Willd. var. nanus
- Indian Flatsedge - Cyperus Nanus Willd. var. subtenuis Kük.
- Indian Frankincense - Boswellia Serrata Roxb. ex Colebr.
- Indian Goosegrass - Eleusine Indica (L.) Gaertn.
- Indian Headdress - Tracyina Rostrata S.F. Blake
- Indian Headdress - Tracyina S.f. Blake
- Indian Hedgemustard - Sisymbrium Orientale L.
- Indian Heliotrope - Heliotropium Indicum L.
- Indian Jointvetch - Aeschynomene Indica L.
- Indian Jujube - Ziziphus Mauritiana Lam.
- Indian Knob Mountainbalm - Eriodictyon Altissimum P.V. Wells
- Indian Lettuce - Lactuca Indica L.
- Indian Long Pepper - Piper Longum L.
- Indian Lovegrass - Eragrostis Pilosa (L.) P. Beauv.
- Indian Mallow - Abutilon Mill.
- Indian Mallow - Bastardiopsis (k. Schum.) Hassler
- Indian Manzanita - Arctostaphylos Mewukka Merriam
- Indian Manzanita - Arctostaphylos Mewukka Merriam ssp. mewukka
- Indian Marshweed - Limnophila Indica (L.) Druce
- Indian Marshweed - Limnophila Indica (L.) Druce var. indica
- Indian Milkvetch - Astragalus Australis (L.) Lam.
- Indian Mulberry - Morinda Citrifolia L.
- Indian Murainagrass - Ischaemum Indicum (Houtt.) Merr.
- Indian Paintbrush - Castilleja Mutis ex L. f.
- Indian Parsley - Aletes J.m. Coult. & Rose
- Indian Pink - Silene Californica Durand
- Indian Plantain - Arnoglossum Raf.
- Indian Plantain - Parasenecio W.w. Sm. & Small
- Indian Plum - Flacourtia Jangomas (Lour.) Rausch.
- Indian Plum - Oemleria Cerasiformis (Torr. & A. Gray ex Hook. & Arn.) Landon
- Indian Potato - Orogenia S. Watson
- Indian Rattlebox - Crotalaria Assamica Benth.
- Indian Rhubarb - Darmera Peltata (Torr. ex Benth.) Voss
- Indian Ricegrass - Achnatherum Hymenoides (Roem. & Schult.) Barkworth
- Indian Rosewood - Dalbergia L. f.
- Indian Rosewood - Dalbergia Latifolia Roxb.
- Indian Rosewood - Dalbergia Sissoo Roxb. ex DC.
- Indian Rubberplant - Ficus Elastica Roxb. ex Hornem.
- Indian Rushpea - Hoffmannseggia Glauca (Ortega) Eifert
- Indian Sandbur - Cenchrus Biflorus Roxb.
- Indian Sedge - Carex Indica L.
- Indian Shot - Canna Indica L.
- Indian Springparsley - Cymopterus Aboriginum M.E. Jones
- Indian Spurgetree - Euphorbia Neriifolia L.
- Indian Strawberry - Duchesnea Indica (Andrews) Teschem.
- Indian Swampweed - Hygrophila Polysperma (Roxb.) T. Anderson
- Indian Teasel - Dipsacus Sativus (L.) Honck.
- Indian Tobacco - Nicotiana Quadrivalvis Pursh
- Indian Tobacco - Nicotiana Quadrivalvis Pursh var. quadrivalvis
- Indian Toothcup - Rotala Indica (Willd.) Koehne
- Indian Valley Brodiaea - Brodiaea Coronaria (Salisb.) Engl. ssp. rosea (Greene) Niehaus
- Indian Valley False Mallow - Malvastrum Americanum (L.) Torr.
- Indian Valley Sedge - Carex Aboriginum M.E. Jones
- Indian Valley Spinycape - Aristocapsa Insignis (Curran) Reveal & Hardham
- Indian Walnut - Aeluropus Littoralis (Gouan) Parl.
- Indian Walnut - Aeluropus Trin.
- Indian Walnut - Aleurites Moluccanus (L.) Willd.
- Indian Walnut - Aleurites Moluccanus (L.) Willd. var. katoi O. Deg., I. Deg. & B.C. Stone
- Indian Warrior - Pedicularis Densiflora Benth. ex Hook.
- Indian Warrior - Pedicularis Densiflora Benth. ex Hook. ssp. aurantiaca E. Sprague
- Indian Warrior - Pedicularis Densiflora Benth. ex Hook. ssp. densiflora
- Indian Woodapple - Limonia Acidissima L.
- Indian Woodoats - Chasmanthium Latifolium (Michx.) Yates
- Indian Yam - Dioscorea Trifida L. f.
- Indian's Dream - Aspidotis Densa (Brack.) Lellinger
- Indian-physic - Gillenia Moench
- Indian-tobacco - Lobelia Inflata L.
- Indianbush - Psacalium Cass.
- Indiangrass - Sorghastrum Nash
- Indiangrass - Sorghastrum Nutans (L.) Nash
- Indianhemp - Apocynum Cannabinum L.
- Indianola Beaksedge - Rhynchospora Indianolensis Small
- Indianpipe - Monotropa L.
- Indianpipe - Monotropa Uniflora L.
- Indiantree Spurge - Euphorbia Tirucalli L.
- Indigo - Indigofera L.
- Indigoberry - Randia L.
- Indigofera Amblyantha Craib
- Indigofera Atriceps Hook. f.
- Indigofera Atriceps Hook. f. ssp. ramosa (Cronquist) J.B. Gillett
- Indigofera Circinella Baker f.
- Indigofera Confusa Prain & Baker f., nom. illeg.
- Indigofera Cordifolia B. Heyne ex Roth
- Indigofera Cryptantha Benth. ex Harv.
- Indigofera Dosua Buch.-Ham. ex D. Don
- Indigofera Echinata Willd.
- Indigofera Endecaphylla Jacq.
- Indigofera Flavicans Baker
- Indigofera Glandulosa J.C. Wendl.
- Indigofera Hochstetteri Baker
- Indigofera Jamaicensis Spreng.
- Indigofera Keyensis Small
- Indigofera Kirilowii Maxim. ex Palib. var. coreana Craib
- Indigofera Leptosepala Nutt. ex Torr. & A. Gray
- Indigofera Macrostachya Bunge
- Indigofera Miniata Ortega var. florida Isely
- Indigofera Miniata Ortega var. leptosepala (Nutt. ex Torr. & A. Gray) B.L. Turner
- Indigofera Miniata Ortega var. miniata
- Indigofera Miniata Ortega var. texana (Buckley) B.L. Turner
- Indigofera Mucronata Spreng. ex DC. var. keyensis (Small) Isely
- Indigofera Mucronata auct. non Spreng. ex DC.
- Indigofera Neglecta N.E. Br.
- Indigofera Nummulariifolia (L.) Livera ex Alston
- Indigofera Parodiana Burkart
- Indigofera Patens Eckl. & Zeyh.
- Indigofera Praticola Baker f.
- Indigofera Pretoriana Harms
- Indigofera Pseudotinctoria Matsum.
- Indigofera Ramosa Cronquist
- Indigofera Rautanenii Baker f.
- Indigofera Retroflexa Baill.
- Indigofera Schimperi Jaub. & Spach
- Indigofera Schinzii N.E. Br.
- Indigofera Sessilifolia DC.
- Indigofera Spicata auct. non Forssk. p.p.
- Indigofera Subulata Vahl ex Poir.
- Indigofera Sumatrana Gaertn.
- Indigofera Teysmannii Miq.
- Indigofera Trita L. f. ssp. scabra (Roth) de Kort & G. Thijsse
- Indigofera Trita L. f. var. keyensis (Small) Kartesz & Gandhi
- Indochina Ormocarpum - Ormocarpum Cochinchinense (Lour.) Merr.
- Indonesian Gum - Eucalyptus Deglupta Blume
- Indusiella Moss - Indusiella Broth. & Müll. Hal.
- Indusiella Moss - Indusiella Thianschanica Broth. & Müll. Hal.
- Inflated Beardtongue - Penstemon Inflatus Crosswh.
- Inflated Cartilage Lichen - Ramalina Inflata (Hook. f. & Taylor) Hook. f. & Taylor
- Inflated Cartilage Lichen - Ramalina Inflata (Hook. f. & Taylor) Hook. f. & Taylor ssp. inflata
- Inflated Grasswidow - Olsynium Douglasii (A. Dietr.) E.P. Bicknell var. inflatum (Suksd.) Cholewa & Dougl
- Inflated Narrow-leaf Sedge - Carex Grisea Wahlenb.
- Inflatedscale Flatsedge - Cyperus Aggregatus (Willd.) Endl.
- Inga Fagifolia (L.) Willd. ex Benth., non G. Don
- Inga Fastulosa (Jacq.) Willd. [excluded]
- Inga Inga (L.) Britton, nom. inval.
- Inga - Inga Mill.
- Inga Quaternata Poepp. & Endl.
- Inkberry - Ilex Glabra (L.) A. Gray
- Inkbush - Forestiera Eggersiana Krug & Urb.
- Inkwood - Hypelate Trifoliata Sw.
- Inland Bluegrass - Poa Nemoralis L. ssp. interior (Rydb.) W.A. Weber
- Inland Gilia - Gilia Interior (H. Mason & A.D. Grant) A.D. Grant & V.E. Grant
- Inland Gooseberry - Ribes Oxyacanthoides L. ssp. setosum (Lindl.) Sinnott
- Inland Leatherfern - Acrostichum Danaeifolium Langsd. & Fisch.
- Inland Muhly - Muhlenbergia Glabriflora Scribn.
- Inland Muilla - Muilla Transmontana Greene
- Inland Rush - Juncus Interior Wiegand
- Inland Rush - Juncus Interior Wiegand var. interior
- Inland Sedge - Carex Interior L.H. Bailey
- Inland Serviceberry - Amelanchier Interior E.L. Nielsen
- Inocarpus Fagifer (Parkinson) F.R. Fosberg
- Inocarpus J.r. Forst. & G. Forst.
- Inodes Exul O.F. Cook
- Inodes Schwarzii O.F. Cook
- Inodes Texana O.F. Cook
- Insideout Flower - Vancouveria C. Morren & Decne.
- Intense Light And Dark Lichen - Pseudevernia Intensa (Nyl.) Hale & W.L. Culb.
- Interior Alkaligrass - Puccinellia Interior T.J. Sørensen
- Interior Bush Lupine - Lupinus Excubitus M.E. Jones var. johnstonii C.P. Sm.
- Interior Ironweed - Vernonia Baldwinii Torr. ssp. interior (Small) Faust
- Interior Live Oak - Quercus Wislizeni A. DC.
- Interior Live Oak - Quercus Wislizeni A. DC. var. frutescens Engelm.
- Interior Live Oak - Quercus Wislizeni A. DC. var. wislizeni
- Interior Phacelia - Phacelia Dubia (L.) Trel. var. interior Fernald
- Interior Seapink - Armeria Maritima (Mill.) Willd. ssp. interior (Raup) C. Lefèbvre & X. Vekemans
- Intermediate Arrowhead - Sagittaria Intermedia Micheli
- Intermediate Balsamroot - Balsamorhiza Careyana A. Gray var. intermedia Cronquist
- Intermediate Barley - Hordeum Jubatum L. ssp. intermedium Bowden
- Intermediate Candle Snuffer Moss - Encalypta Intermedia Jur.
- Intermediate Cartilage Lichen - Ramalina Intermedia (Delise ex Nyl.) Nyl.
- Intermediate Cliffbrake - Pellaea Intermedia Mett. ex Kuhn
- Intermediate Cottongrass - Eriophorum ×medium Andersson
- Intermediate Cottongrass - Eriophorum ×medium Andersson ssp. album J. Cay.
- Intermediate Cottongrass - Eriophorum ×medium Andersson ssp. ×medium
- Intermediate Cup Lichen - Cladonia Ecmocyna Leight. ssp. intermedia (Robbins) Ahti
- Intermediate Duckweed - Spirodela Intermedia W.D.J. Koch
- Intermediate Fishhook Cactus - Sclerocactus Parviflorus Clover & Jotter ssp. intermedius (Peebles) K.D. Heil & J.M. Port
- Intermediate Mermaidweed - Proserpinaca Intermedia Mack.
- Intermediate Needle And Thread - Hesperostipa Comata (Trin. & Rupr.) Barkworth ssp. intermedia (Scribn. & Tweedy) Bar
- Intermediate Orange Lichen - Caloplaca Intermedia (de Lesd.) Zahlbr.
- Intermediate Paspalum - Paspalum Intermedium Munro ex Morong
- Intermediate Pepperweed - Lepidium Virginicum L. var. medium (Greene) C.L. Hitchc.
- Intermediate Plagiomnium Moss - Plagiomnium Medium (Bruch & Schimp.) T. Kop.
- Intermediate Plagiomnium Moss - Plagiomnium Medium (Bruch & Schimp.) T. Kop. var. curvatulum (Lindb.) H.A. Crum & L
- Intermediate Plagiomnium Moss - Plagiomnium Medium (Bruch & Schimp.) T. Kop. var. medium
- Intermediate Pottia Moss - Pottia Intermedia (Turner) Fürnr.
- Intermediate Snow Lichen - Stereocaulon Intermedium (Savicz) H. Magn.
- Intermediate Suncup - Camissonia Intermedia P.H. Raven
- Intermediate Treebine - Cissus Intermedia A. Rich.
- Intermediate Wheatgrass - Thinopyrum Intermedium (Host) Barkworth & D.R. Dewey
- Intermediate Woodfern - Dryopteris Intermedia (Muhl. ex Willd.) A. Gray
- Intermediate Yellowcress - Rorippa Intermedia (Kuntze) R. Stuckey
- Intermediate Yucca - Yucca Baileyi Wooton & Standl. var. intermedia (McKelvey) Reveal
- Intermountain Bedstraw - Galium Serpenticum Dempster
- Intermountain Bedstraw - Galium Serpenticum Dempster ssp. puberulum (Piper) Dempster & Ehrend.
- Intermountain Bedstraw - Galium Serpenticum Dempster ssp. scabridum (Ehrend.) Dempster & Ehrend.
- Intermountain Bedstraw - Galium Serpenticum Dempster ssp. serpenticum
- Intermountain Bedstraw - Galium Serpenticum Dempster ssp. wenatchicum Dempster & Ehrend.
- Intermountain Bladderpod - Lesquerella Hemiphysaria Maguire
- Intermountain Bladderpod - Lesquerella Hemiphysaria Maguire var. hemiphysaria
- Intermountain Bladderpod - Lesquerella Hemiphysaria Maguire var. lucens S.L. Welsh & Reveal
- Intermountain Bog Orchid - Platanthera Tescamnis Sheviak & W.F. Jenn.
- Intermountain Clover - Trifolium Andinum Nutt.
- Intermountain Clover - Trifolium Andinum Nutt. var. andinum
- Intermountain Clover - Trifolium Andinum Nutt. var. podocephalum Barneby
- Intermountain Indian Breadroot - Pediomelum Megalanthum (Wooton & Standl.) Rydb.
- Intermountain Indian Breadroot - Pediomelum Megalanthum (Wooton & Standl.) Rydb. var. epipsilum (Barneby) J. Grimes
- Intermountain Indian Breadroot - Pediomelum Megalanthum (Wooton & Standl.) Rydb. var. megalanthum
- Intermountain Indian Breadroot - Pediomelum Megalanthum (Wooton & Standl.) Rydb. var. retrorsum (Rydb.) J. Grimes
- Intermountain Lupine - Lupinus Pusillus Pursh ssp. intermontanus (A. Heller) D. Dunn
- Intermountain Milkwort - Polygala Intermontana T. Wendt
- Intermountain Mousetail - Ivesia Sabulosa (M.E. Jones) D.D. Keck
- Intermountain Phacelia - Phacelia Demissa A. Gray
- Intermountain Phacelia - Phacelia Demissa A. Gray var. demissa
- Intermountain Phacelia - Phacelia Demissa A. Gray var. minor N.D. Atwood
- Intermountain Rubberweed - Hymenoxys Helenioides (Rydb.) Cockerell
- Interrupted Fern - Osmunda Claytoniana L.
- Intestine Silverskin Lichen - Dermatocarpon Intestiniforme (Körb.) Hasse
- Intoxicating Yam - Dioscorea Hispida Dennst.
- Intricate Orthothecium Moss - Orthothecium Intricatum (Hartm.) Schimp.
- Intricate Pylaisiella Moss - Pylaisiella Intricata (Hedw.) Grout
- Intricate Rim Lichen - Lecanora Intricata (Ach.) Ach.
- Introduced Sage - Salvia Pratensis L.
- Intsia Thouars
- Inuit Wallflower - Parrya Nauruaq Al-Shehbaz, J.R. Grant, R. Lipkin, D.F. Murray & C.L. Parker
- Inula Alba Nutt.
- Inula Divaricata Nutt.
- Inula Dysenterica L.
- Inula Ericoides Torr.
- Inula Gossypina Michx.
- Inula Graveolens (L.) Desf.
- Inula Mariana L.
- Inula Viscosa (L.) Aiton
- Inundated Clubmoss - Lycopodiella Inundata (L.) Holub
- Inyo Beardtongue - Penstemon Papillatus J.T. Howell
- Inyo Bedstraw - Galium Hypotrichium A. Gray ssp. inyoense Dempster & Ehrend.
- Inyo Biscuitroot - Lomatium Foeniculaceum (Nutt.) J.M. Coult. & Rose ssp. inyoense (Mathias & Constance ex
- Inyo Blazingstar - Mentzelia Inyoensis Prigge
- Inyo Buckwheat - Eriogonum Latens Jeps.
- Inyo County Star-tulip - Calochortus Excavatus Greene
- Inyo Frasera - Frasera Puberulenta Davidson
- Inyo Gilia - Linanthus Inyoensis (I.M. Johnst.) J.M. Porter & L.A. Johnson
- Inyo Lupine - Lupinus ×inyoensis A. Heller (pro sp.)
- Inyo Meadow Lupine - Lupinus Pratensis A. Heller
- Inyo Meadow Lupine - Lupinus Pratensis A. Heller var. eriostachyus C.P. Sm.
- Inyo Meadow Lupine - Lupinus Pratensis A. Heller var. pratensis
- Inyo Milkvetch - Astragalus Inyoensis Sheldon
- Inyo Phacelia - Phacelia Inyoensis (J.F. Macbr.) J.T. Howell
- Inyo Princesplume - Stanleya Pinnata (Pursh) Britton var. inyoensis (Munz & Roos) Reveal
- Inyo Rockcress - Arabis Inyoensis Rollins
- Inyo Rockdaisy - Perityle Inyoensis (Ferris) A. Powell
- Iochroma Fuchsioides (Bonpl.) Miers
- Iochroma - Iochroma Benth., nom. cons.
- Iodanthus Dentatus (Torr.) Greene
- Iodanthus Hesperidioides (Torr. & A. Gray) A. Gray
- Iodanthus - Iodanthus Torr. & A. Gray
- Iodinebush - Allenrolfea Occidentalis (S. Watson) Kuntze
- Ionaspis Alba Lutzoni
- Ionaspis Annularis H. Magn.
- Ionaspis Arctica Lynge
- Ionaspis Chrysophana (Körb.) Stein
- Ionaspis Epulotica (Ach.) Arnold
- Ionaspis Epulotica (Ach.) Arnold var. arctica (Lynge) H. Magn.
- Ionaspis Heteromorpha (Krempelh.) Arnold
- Ionaspis Lacustris (With.) Lutzoni
- Ionaspis Liche - Ionaspis Odora (Ach.) Stein
- Ionaspis Lichen - Ionaspis Lavata H. Magn.
- Ionaspis Lichen - Ionaspis Suaveolens (Fr.) Th. Fr.
- Ionaspis Lichen - Ionaspis Th. Fr.
- Ionaspis Melanocarpa (Krempelh.) Arnold
- Ionaspis Ochracella (Nyl.) H. Magn.
- Ionaspis Ochromicra (Nyl.) Hue
- Ionaspis Reducta H. Magn.
- Ionaspis Schismatopsis (Nyl.) Hue
- Ionaspis Suaveolens (Ach. ex Schaerer) Stein
- Ione Buckwheat - Eriogonum Apricum J.T. Howell
- Ione Buckwheat - Eriogonum Apricum J.T. Howell var. apricum
- Ione Manzanita - Arctostaphylos Myrtifolia Parry
- Ionidium Linearifolium (Vahl) Gingins
- Ionidium Portoricense (Urb.) Krug & Urb. ex Britton & P. Wilson
- Ionopsidium - Ionopsidium Rchb.
- Ionoxalis Caerulea Small
- Ionoxalis Intermedia (A. Rich.) Small
- Ionoxalis Martiana (Zucc.) Small
- Ionoxalis Violacea (L.) Small
- Iowa Barley - ×elyhordeum Iowense Pohl
- Iowa Golden Saxifrage - Chrysosplenium Alternifolium L. var. sibiricum Ser. ex DC.
- Iowa Moonwort - Botrychium Campestre W.H. Wagner & Farrar
- Iowa Rim Lichen - Lecanora Iowensis Fink
- Iowa Rinodina Lichen - Rinodina Iowensis Zahlbr.
- Ioxylon Pomiferum Raf., orth. var.
- Ipecac - Cephaelis Ipecacuanha (Brot.) Tussac
- Ipheion Uniflorum (Lindl.) Raf.
- Ipomoea Acuminata (Vahl) Roem. & Schult.
- Ipomoea Aegyptia L.
- Ipomoea Angustifolia Jacq.
- Ipomoea Aristolochiifolia auct. non (Kunth) G. Don
- Ipomoea Barbigera Sweet
- Ipomoea Bona-nox L.
- Ipomoea Brasiliensis (L.) Sweet
- Ipomoea Cairica (L.) Sweet var. hederacea Hallier f.
- Ipomoea Cairica (L.) Sweet var. lineariloba (Hillebr.) O. Deg. & van Ooststr.
- Ipomoea Campanulata auct. non L.
- Ipomoea Carolina (L.) Pursh, non L.
- Ipomoea Caroliniana sensu Small, non Poir.
- Ipomoea Cathartica Poir.
- Ipomoea Coccinea L. var. hederifolia (L.) A. Gray
- Ipomoea Congesta R. Br.
- Ipomoea Corymbosa (L.) Roth ex Roem. & Schult.
- Ipomoea Crassicaulis (Benth.) B.L. Rob.
- Ipomoea Cuneifolia A. Gray, non Meisn.
- Ipomoea Curtisii House
- Ipomoea Desertorum House
- Ipomoea Dissecta (Jacq.) Pursh
- Ipomoea Egregia House
- Ipomoea Fastigiata (Roxb.) Sweet
- Ipomoea Fistulosa Mart. ex Choisy
- Ipomoea Gracilis auct. non R. Br.
- Ipomoea Hederacea Jacq. var. integriuscula A. Gray
- Ipomoea Hederacea auct. non Jacq.
- Ipomoea Heptaphylla (Roxb.) Voigt
- Ipomoea Heterophylla Ortega
- Ipomoea Hirsutula Jacq. f.
- Ipomoea Hirsutula auct. non Jacq. f.
- Ipomoea Hispida (Vahl) Roem. & Schult.
- Ipomoea Indica (Burm. f.) Merr. var. acuminata (Vahl) Fosberg
- Ipomoea Lemmonii A. Gray
- Ipomoea Leptotoma Torr.
- Ipomoea Leptotoma Torr. var. wootonii E.H. Kelso
- Ipomoea Macrantha Roem. & Schult.
- Ipomoea Mauritiana Jacq.
- Ipomoea Melanotricha Brandegee
- Ipomoea Muricata (L.) Jacq.
- Ipomoea Muricata Cav., non (L.) Jacq.
- Ipomoea Mutabilis Lindl.
- Ipomoea Nil auct. non (L.) Roth
- Ipomoea Ochracea (Lindl.) G. Don var. curtisii (House) Stearn
- Ipomoea Ochracea (Lindl.) G. Don var. ochracea
- Ipomoea Ochroleuca auct. non Spanoghe
- Ipomoea Palustris (Urb.) Urb.
- Ipomoea Pandurata (L.) G. Mey. var. rubescens Choisy
- Ipomoea Pes-caprae (L.) R. Br. var. emarginata Hallier f.
- Ipomoea Petiolaris (Kunth) G. Don
- Ipomoea Pinnatifida (Kunth) G. Don
- Ipomoea Plummerae A. Gray var. cuneifolia (A. Gray) J.F. Macbr.
- Ipomoea Plummerae A. Gray var. egregia (House) Soreng & Spellenb.
- Ipomoea Plummerae A. Gray var. plummerae
- Ipomoea Polyanthes Roem. & Schult.
- Ipomoea Pulchella Roth
- Ipomoea Purpurea (L.) Roth var. diversifolia (Lindl.) O'Donell
- Ipomoea Quinquefolia L.
- Ipomoea Repanda Jacq. var. microdactyla (Griseb.) D.A. Powell
- Ipomoea Reptans auct.
- Ipomoea Rubra (Vahl) Millsp.
- Ipomoea Sinuata Ortega
- Ipomoea Solanifolia L.
- Ipomoea Spiralis House
- Ipomoea Stolonifera J.F. Gmel.
- Ipomoea Tamnifolia L.
- Ipomoea Tiliacea auct. non (Willd.) Choisy
- Ipomoea Trichocarpa Elliott
- Ipomoea Trichocarpa Elliott var. torreyana (A. Gray) Shinners
- Ipomoea Trifida (Kunth) G. Don var. torreyana A. Gray
- Ipomoea Trifida auct. non (Kunth) G. Don. p.p.
- Ipomoea Triloba auct. non L.
- Ipomoea Triquetra (Vahl) Roem. & Schult.
- Ipomoea Tuba (Schltdl.) G. Don
- Ipomoea Tuberosa L.
- Ipomoea Tuboides O. Deg. & van Ooststr. var. pubescens Lag.
- Ipomoea Turpethum (L.) R. Br.
- Ipomopsis Aggregata (Pursh) V.E. Grant ssp. arizonica (Greene) V.E. Grant & A.D. Gra
- Ipomopsis Aggregata (Pursh) V.E. Grant ssp. texana (Greene) W.C. Martin & C.R. Hutch
- Ipomopsis Aggregata (Pursh) V.E. Grant var. attenuata (A. Gray) Dorn
- Ipomopsis Aggregata (Pursh) V.E. Grant var. macrosiphon (Kearney & Peebles) Dorn
- Ipomopsis Aggregata (Pursh) V.E. Grant var. tenuituba (Rydb.) Dorn
- Ipomopsis Aggregata (Pursh) V.E. Grant var. tenuituba (Rydb.) Dorn, database artifac
- Ipomopsis Aggregata (Pursh) V.E. Grant var. texana (Greene) Shinners
- Ipomopsis Aggregata (Pursh) V.E. Grant var. weberi (V.E. Grant & Wilken) Dorn
- Ipomopsis Arizonica (Greene) Wherry ssp. texana (Greene) Wherry
- Ipomopsis Bridgesii (A. Gray) Wherry
- Ipomopsis Campylantha (Wooton & Standl.) W.C. Martin & C.R. Hutchins
- Ipomopsis Candida (Rydb.) W.A. Weber
- Ipomopsis Congesta (Hook.) V.E. Grant var. nevadensis (Tidestr.) Tiehm
- Ipomopsis Congesta (Hook.) V.E. Grant var. pseudotypica (Constance & Rollins) Dorn
- Ipomopsis Crebrifolia (Nutt.) Dorn
- Ipomopsis Depressa (M.E. Jones ex A. Gray) V.E. Grant
- Ipomopsis Frutescens (Rydb.) V.E. Grant
- Ipomopsis - Ipomopsis Michx.
- Ipomopsis Spicata (Nutt.) V.E. Grant ssp. robruthiorum Wilken & R.L. Hartm., orth.
- Ipomopsis Spicata (Nutt.) V.E. Grant var. robruthii (Wilken & R.L. Hartm.) Dorn
- Ipomopsis Spicata (Nutt.) V.E. Grant var. robruthiorum (Wilken & R.L. Hartm.) Dorn
- Ipomopsis Stenothyrsa (A. Gray) W.A. Weber
- Ipomopsis Tenuituba (Rydb.) V.E. Grant ssp. macrosiphon (Kearney & Peebles) V.E. Gra
- Iranian Knapweed - Centaurea Depressa M. Bieb.
- Iranian Stork's Bill - Erodium Gruinum (L.) L'Hér. ex Aiton
- Iresine Canescens Humb. & Bonpl. ex Willd.
- Iresine Celosia L.
- Iresine Celosioides L.
- Iresine Celosioides auct. non L.
- Iresine Elatior A. Rich. ex Willd.
- Iresine Elongata Humb. & Bonpl. ex Willd.
- Iresine Grandiflora Hook.
- Iresine Keyensis Millsp.
- Iresine Paniculata (L.) Kuntze, non Poir.
- Iresine Paniculata Poir.
- Irion County Buckwheat - Eriogonum Nealleyi J.M. Coult.
- Iris Acleantha Small
- Iris Alabamensis Small
- Iris Albilinea Alexander
- Iris Albispiritus Small
- Iris Alticristata Small
- Iris Amabilis Eastw.
- Iris Amnicola Alexander
- Iris Atrocyanea Small
- Iris Atroenantha Small
- Iris Auralata Small
- Iris Aurilinea Alexander
- Iris Bifurcata Small
- Iris Bismarckiana Regel
- Iris Brevipes Small
- Iris Californica Leichtlin
- Iris Callilopha Alexander
- Iris Callirhodea Alexander
- Iris Carolina Radius
- Iris Cerasioides Alexander
- Iris Chamaeiris Bertol.
- Iris Chlorolopha Small
- Iris Chrysaeola Small
- Iris Chrysolopha Small
- Iris Chrysophoenicia Small
- Iris Citricristata Small
- Iris Citrina Eastw.
- Iris Citriviola Small
- Iris Cristata Aiton ssp. lacustris (Nutt.) Iltis
- Iris Cristata Aiton var. alba Dykes
- Iris Cristata Aiton var. lacustris (Nutt.) Dykes
- Iris Crocinubia Alexander
- Iris Cyanantha Alexander
- Iris Cyanochrysea Small
- Iris Dewinkeleri Small
- Iris Domestica (L.) Goldblatt & Mabb.
- Iris Douglasiana Herb. var. major Torr.
- Iris Douglasiana Herb. var. oregonensis R.C. Foster
- Iris Duerinckii Buckley
- Iris Ecristata Alexander
- Iris Elephantina Small
- Iris Florentina L.
- Iris Fluviatilis Small
- Iris Foetida Thunb.
- Iris Foliosa Mack. & Bush
- Iris Foliosa Mack. & Bush var. boonensis Daniels
- Iris Fourchiana Small
- Iris Fulvaurea Small
- Iris Fumiflora Alexander
- Iris Fumifulva Small
- Iris Fuscaurea Small
- Iris Fuscirosea Small
- Iris Fuscisanguinea Alexander
- Iris Fuscivenosa Small
- Iris Gentilliana Alexander
- Iris Georgiana Britton
- Iris Halophila Pall.
- Iris Hartwegii Baker var. australis Parish
- Iris Hookeri Penny ex G. Don
- Iris Humboldtiana Eastw.
- Iris Ianthina Alexander
- Iris Iochroma Small
- Iris Iocyanea Small
- Iris Iodantha Alexander
- Iris Ioleuca Alexander
- Iris Iophaea Alexander
- Iris - Iris L.
- Iris - Iris ×fulvala Dykes
- Iris - Iris ×robusta E.S. Anderson
- Iris Kaempferi Siebold ex Lem.
- Iris Kimballiae Small
- Iris Lancipetala Alexander
- Iris Landsdaleana Eastw.
- Iris Lilacinaurea Alexander
- Iris Longipetala Herb.
- Iris Ludoviciana Small
- Iris Macrosiphon Torr. var. purdyi (Eastw.) Jeps.
- Iris Marplei Alexander
- Iris Martinicensis Jacq.
- Iris Miraculosa Small
- Iris Mississippiensis Alexander
- Iris Missouriensis Nutt. var. arizonica (Dykes) R.C. Foster
- Iris Missouriensis Nutt. var. pelogonus (Goodding) R.C. Foster
- Iris Moricolor Small
- Iris Ochroleuca L.
- Iris Oenantha Small
- Iris Oolopha Alexander
- Iris Orientalis Thunb., non Mill.
- Iris Pallidirosea Alexander
- Iris Paludicola Alexander
- Iris Pariensis S.L. Welsh
- Iris Parvicaerulea Alexander
- Iris Parvirosea Small
- Iris Phoenicis Small
- Iris Pinetorum Eastw.
- Iris Polystachya Thunb.
- Iris Prismatica Pursh ex Ker Gawl. var. austrina Fernald
- Iris Pseudocristata Small
- Iris Pumila L. var. flaviflora Fuss.
- Iris Purpurissata Small
- Iris Pyrrholopha Alexander
- Iris Regalis Small
- Iris Regifulva Alexander
- Iris Reticulata M. Bieb.
- Iris Rhodantha Alexander
- Iris Rhodochrysea Small
- Iris Rivularis Small
- Iris Rosiflora Small
- Iris Rosilutea Alexander
- Iris Rosipurpurea Alexander
- Iris Rubea Alexander
- Iris Rubicunda Small
- Iris Rubrolilacina Alexander
- Iris Salmonicolor Small
- Iris Savannarum Small
- Iris Schizolopha Alexander
- Iris Setosa Pall. ex Link ssp. canadensis (Foster ex B.L. Rob. & Fernald) Hu
- Iris Setosa Pall. ex Link ssp. interior (E.S. Anderson) Hultén
- Iris Setosa Pall. ex Link var. platyrhyncha Hultén
- Iris Shrevei Small
- Iris Sibirica sensu Thunb., non L.
- Iris Spuria L. ssp. guldenstaedtiana (Lepech.) Soldano
- Iris Subfulva Small
- Iris Tenax Douglas ex Lindl. ssp. chrysophylla (Howell) Q. Clarkson
- Iris Tenax Douglas ex Lindl. ssp. gormanii Piper
- Iris Tenax Douglas ex Lindl. ssp. innominata (L.F. Hend.) Q. Clarkson
- Iris Tenax Douglas ex Lindl. ssp. thompsonii (R.C. Foster) Q. Clarkson
- Iris Tenax Douglas ex Lindl. var. gormanii (Piper) R.C. Foster
- Iris Tenuissima Dykes var. purdyiformis R.C. Foster
- Iris Thomasii Small
- Iris Tolmieana Herb.
- Iris Tripetala Walter, non L. f.
- Iris Tyriana Small
- Iris Venulosa Alexander
- Iris Versicolor L. var. blandescens Nieuwl.
- Iris Versicolor L. var. shrevei (Small) B. Boivin
- Iris Violilutea Alexander
- Iris Violipurpurea Small
- Iris Violivenosa Small
- Iris Viridis Alexander
- Iris Viridivinea Small
- Iris Wherryana Small
- Iris ×flexicaulis Small
- Iris-flowered Canna - Canna Iridiflora Ruiz & Pav.
- Irish Hill Buckwheat - Eriogonum Apricum J.T. Howell var. prostratum Myatt
- Irish Potato - Solanum Tuberosum L.
- Irisleaf Rush - Juncus Xiphioides E. Mey.
- Irisleaf Yelloweyed Grass - Xyris Laxifolia Mart. var. iridifolia (Chapm.) Kral
- Iron Fern - Rumohra Adiantiformis (G. Forst.) Ching
- Iron Ipomopsis - Ipomopsis Laxiflora (J.M. Coult.) V.E. Grant
- Iron River Dewberry - Rubus Ferrofluvius H.A. Davis, A.M. Fuller & T. Davis
- Ironweed - Cyanthillium Blume
- Ironweed - Vernonia Anthelmintica (L.) Willd.
- Ironweed - Vernonia Galamensis (Cass.) Less.
- Ironweed - Vernonia Schreb.
- Ironweed - Vernonia ×concinna Gleason (pro sp.)
- Ironweed - Vernonia ×dissimilis Gleason (pro sp.)
- Ironweed - Vernonia ×georgiana Bartlett (pro sp.)
- Ironweed - Vernonia ×illinoensis Gleason
- Ironweed - Vernonia ×peralta Daniels
- Ironwood - Eusideroxylon Teijsm. & Binnend.
- Ironwood - Parrotia C.a. Mey.
- Ironwort - Sideritis L.
- Iroucana Guianensis Aubl.
- Irregular Polypody - Polypodium Amorphum Suksd.
- Isachne - Isachne Carolinensis Ohwi
- Isachne - Isachne Confusa Ohwi
- Isachne - Isachne Miliacea Roth
- Isachne - Isachne Pulchella Roth
- Isachne - Isachne Purpurascens Glassman
- Isachne Miliacea Roth var. miliacea
- Isachne Miliacea Roth var. minutula (Gaudich.) Fosberg & Sachet
- Isachne Myosotis Nees [excluded]
- Isachne Polygonoides (Lam.) Döll [excluded]
- Isandrina Emarginata (L.) Britton & Rose ex Britton & P. Wilson
- Isanthus Brachiatus (L.) Britton, Sterns & Poggenb.
- Isanthus Brachiatus (L.) Britton, Sterns & Poggenb. var. linearis Fassett
- Ischaemum Angustifolium (Trin.) Hack.
- Ischaemum Arcuatum (Nees) Stapf
- Ischaemum Aureum (Hook. & Arn.) Hack. [excluded]
- Ischaemum Ciliare Retz.
- Ischaemum Digitatum Brongn. [excluded]
- Ischaemum Fasciculatum Brongn.
- Ischaemum - Ischaemum Chordatum (Trin.) Hack ex Warb.
- Ischaemum Longisetum Merr.
- Ischaemum Longisetum Merr. var. longisetum
- Ischaemum Ophiuroides Munro
- Ischaemum Polystachyum J. Presl
- Ischaemum Polystachyum J. Presl var. polystachyum
- Ischaemum Rugosum Salisb. var. segetum (Trin.) Hack.
- Ischaemum Secundatum Walter
- Ischaemum Tumidum Stapf ex Bor
- Iseilema Andersson
- Iseilema Macratherum Domin
- Isely's Milkvetch - Astragalus Iselyi S.L. Welsh
- Isely's Senna - Senna Durangensis (Rose) Irwin & Barneby var. iselyi (Irwin & Barneby) Irwin & Bar
- Isely's Stickpea - Calliandra Iselyi B.L. Turner
- Isidrogalvia Flava (McDaniel) Remizowa, D.D. Sokoloff, L.M. Campb., D.W. Stev. & Ru
- Island Babyboot Orchid - Lepanthes Dodiana Stimson
- Island Barberry - Mahonia Pinnata (Lag.) Fedde ssp. insularis (Munz) J.B. Roof
- Island Blackberry - Rubus Insulanus L.H. Bailey
- Island Bristleweed - Hazardia Detonsa (Greene) Greene
- Island Brittleleaf - Gonocalyx Concolor Nevl.
- Island Broom - Lotus Dendroideus (Greene) Greene
- Island Broom - Lotus Dendroideus (Greene) Greene var. dendroideus
- Island Bush Monkeyflower - Diplacus Parviflorus Greene
- Island Bushmint - Hyptis Lantanifolia Poit.
- Island Ceanothus - Ceanothus Megacarpus Nutt. var. insularis (Eastw.) Munz
- Island Cetraria Lichen - Cetraria Islandica (L.) Ach.
- Island Cetraria Lichen - Cetraria Islandica (L.) Ach. ssp. crispiformis (Rasanen) Karnefelt
- Island Chinchweed - Pectis Tenuicaulis Urb.
- Island Cyrtandra - Cyrtandra Wainihaensis Levl.
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. amplissima Brummitt
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. arida (Greene) Brummitt
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. cyclostegia (House) Brummitt
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. intermedia (Abrams) Brummitt
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. macrostegia
- Island False Bindweed - Calystegia Macrostegia (Greene) Brummitt ssp. tenuifolia (Abrams) Brummitt
- Island Glorybush - Trembleya Phlogiformis DC.
- Island Glorybush - Trembleya Phlogiformis DC. var. parvifolia Cogn.
- Island Goldback Fern - Pityrogramma Chrysophylla (Sw.) Link
- Island Goldback Fern - Pityrogramma Chrysophylla (Sw.) Link var. gabrielae Domin
- Island Goldback Fern - Pityrogramma Chrysophylla (Sw.) Link var. subflexuosa (Domin) Proctor
- Island Gooseberry - Ribes Viburnifolium A. Gray
- Island Grapefern - Sceptridium Subbifoliatum (Brack.) W.H. Wagner
- Island Hazardia - Hazardia Cana (A. Gray) Greene
- Island Jepsonia - Jepsonia Malvifolia (Greene) Small
- Island Kihifern - Adenophorus Haalilioanus (Brack.) K.A. Wilson
- Island Lacefern - Nothoperanema (tagawa) Ching
- Island Lacefern - Nothoperanema Rubiginosum (Brack.) A.R. Sm. & D. Palmer
- Island Lantana - Lantana Insularis Moldenke
- Island Live Oak - Quercus Tomentella Engelm.
- Island Mallow - Lavatera Assurgentiflora Kellogg
- Island Mallow - Lavatera Assurgentiflora Kellogg ssp. assurgentiflora
- Island Manzanita - Arctostaphylos Insularis Greene ex Parry
- Island Marlberry - Ardisia Escallonoides Schiede & Deppe ex Schltdl. & Cham.
- Island Mistletoe - Phoradendron Barahonae Urb. & Trel.
- Island Mountain Mahogany - Cercocarpus Montanus Raf. var. blancheae (C.K. Schneid.) F.L. Martin
- Island Orange Lichen - Caloplaca Insularis Poelt
- Island Pea - Christia Moench
- Island Peacock Orchid - Psychilis Macconnelliae Sauleda
- Island Pitchersage - Lepechinia Fragrans (Greene) Epling
- Island Purslane - Koenigia Islandica L.
- Island Puzzle - Aerva Sericea Moq.
- Island Redberry - Rhamnus Pirifolia Greene
- Island Renegade - Henrya Insularis Nees ex Benth.
- Island Rushrose - Helianthemum Greenei B.L. Rob.
- Island Sagebrush - Artemisia Nesiotica P.H. Raven
- Island Sand Pea - Eriosema Crinitum (Kunth) G. Don
- Island Sand Verbena - Abronia Insularis Standl.
- Island Schiedea - Schiedea Hawaiiensis Hillebr.
- Island Senecio - Senecio Lyonii A. Gray
- Island Speedwell - Veronica Plebia R. Br.
- Island Spleenwort - Diellia Brack.
- Island Spleenwort - Diellia ×lauii W.H. Wagner
- Island Swordfern - Polystichum Haleakalense Brack.
- Island Tonguefern - Elaphoglossum Wawrae (Luerss.) C. Chr.
- Island Wallflower - Erysimum Insulare Greene
- Island Wallflower - Erysimum Insulare Greene ssp. insulare
- Island Wallflower - Erysimum Insulare Greene ssp. suffrutescens (Abrams) R.A. Price
- Island Waxweed - Cuphea Parsonsia (L.) R. Br. ex Steud.
- Island Yellowwood - Ochrosia Haleakalae H. St. John
- Island-aster - Hesperomannia A. Gray
- Island-daisy - Keysseria Lauterb.
- Islandfern - Olfersia Raddi
- Islandthicket Thoroughwort - Koanophyllon Polyodon (Urb.) R.M. King & H. Rob.
- Islandthicket Threeawn - Aristida Refracta Griseb.
- Isle Royale Ragwort - Packera Insulae-regalis R.R. Kowal
- Isle-of-pines Crabgrass - Digitaria Simpsonii (Vasey) Fernald
- Ismelia Carinata (Schousb.) Sch. Bip.
- Isnardia Intermedia Small & Alexander
- Isnardia Palustris L., non Jussiaea palustris G. Mey.
- Isnardia Repens (J.R. Forst.) DC.
- Isnardia Spathulata (Torr. & A. Gray) Small
- Isochilus - Isochilus R. Br.
- Isocoma Acradenia (Greene) Greene ssp. eremophila (Greene) R.M. Beauch.
- Isocoma Bracteosa Greene
- Isocoma Coronopifolia (A. Gray) Greene var. pedicellata (Greene) G.L. Nesom
- Isocoma Eremophila Greene
- Isocoma Megalantha Shinners
- Isocoma Oxyphylla Greene
- Isocoma Palmeri (A. Gray) Shinners
- Isocoma Pedicellata Greene
- Isocoma Veneta (Kunth) Greene [excluded]
- Isocoma Veneta (Kunth) Greene var. furfuracea (Greene) R.M. Beauch.
- Isocoma Veneta (Kunth) Greene var. oxyphylla (Greene) R.M. Beauch.
- Isocoma Veneta (Kunth) Greene var. sedoides (Greene) Jeps.
- Isocoma Veneta (Kunth) Greene var. vernonioides (Nutt.) Jeps.
- Isocoma Vernonioides Nutt.
- Isocoma Wrightii (A. Gray) Rydb.
- Isodendrion Forbesii H. St. John
- Isodendrion Hawaiiense H. St. John
- Isodendrion Hillebrandii H. St. John
- Isodendrion - Isodendrion A. Gray
- Isodendrion Lanaiense H. St. John
- Isodendrion Lydgatei H. St. John
- Isodendrion Maculatum H. St. John
- Isodendrion Molokaiense H. St. John
- Isodendrion Remyi H. St. John
- Isodendrion Subsessilifolium A. Heller
- Isodendrion Waianaeense H. St. John
- Isoetes Bolanderi Engelm. var. pygmaea (Engelm.) Clute
- Isoetes Braunii Durieu
- Isoetes Canadensis (Engelm.) A.A. Eaton
- Isoetes Caroliniana (A.A. Eaton) N. Luebke
- Isoetes Eatonii R. Dodge var. gravesii (A.A. Eaton) Clute, nom. dub.
- Isoetes Echinospora Durieu
- Isoetes Echinospora Durieu ssp. asiatica (Makino) Á. Löve
- Isoetes Echinospora Durieu ssp. maritima (Underw.) Á. Löve
- Isoetes Echinospora Durieu ssp. muricata (Durieu) Á. Löve & D. Löve
- Isoetes Echinospora Durieu var. asiatica Makino
- Isoetes Echinospora Durieu var. braunii (Durieu) Engelm.
- Isoetes Echinospora Durieu var. hesperia (C.F. Reed) Á. Löve
- Isoetes Echinospora Durieu var. maritima (Underw.) A.A. Eaton
- Isoetes Echinospora Durieu var. muricata (Durieu) Engelm.
- Isoetes Echinospora Durieu var. robusta Engelm.
- Isoetes Echinospora Durieu var. savilei B. Boivin
- Isoetes Engelmannii A. Braun var. caroliniana A.A. Eaton
- Isoetes Engelmannii A. Braun var. georgiana Engelm.
- Isoetes Engelmannii A. Braun var. gracilis Engelm.
- Isoetes Engelmannii A. Braun var. valida Engelm.
- Isoetes Flaccida Shuttlw. ex A. Braun var. rigida Engelm. [excluded]
- Isoetes Flettii (A.A. Eaton) N.E. Pfeiffer
- Isoetes Gravesii A.A. Eaton
- Isoetes Hieroglyphica A.A. Eaton
- Isoetes Howellii Engelm. var. minima (A.A. Eaton) Pfeiffer
- Isoetes Lacustris L. ssp. paupercula (Engelm.) J. Feilberg
- Isoetes Lacustris L. var. paupercula Engelm.
- Isoetes Muricata Durieu
- Isoetes Muricata Durieu ssp. maritima (Underw.) Hultén
- Isoetes Muricata Durieu var. braunii (Durieu) C.F. Reed
- Isoetes Muricata Durieu var. hesperia C.F. Reed
- Isoetes Nuttallii A. Braun ex Engelm. var. orcuttii (A.A. Eaton) Clute
- Isoetes Paupercula (Engelm.) A.A. Eaton
- Isoetes Piperi A.A. Eaton
- Isoetes Pygmaea Engelm.
- Isoetes Riparia Engelm. ex A. Braun var. canadensis Engelm.
- Isoetes Riparia Engelm. ex A. Braun var. palmeri (A.A. Eaton) Proctor
- Isoetes Riparia Engelm. ex A. Braun var. reticulata (A.A. Eaton) Proctor
- Isoetes Riparia Engelm. ex A. Braun var. robbinsii (A.A. Eaton) Proctor
- Isoetes Saccharata Engelm. var. amesii A.A. Eaton
- Isoetes Setacea Lam. p.p.
- Isoetes Setacea Lam. ssp. muricata (Durieu) Holub
- Isoetes Tuckermanii A. Braun var. harveyi (A.A. Eaton) Clute
- Isoetes Tuckermanii A. Braun var. heterospora (A.A. Eaton) Clute
- Isoetes Virginica N.E. Pfeiffer var. piedmontana N.E. Pfeiffer
- Isoetes ×carltaylori Musselman, orth. var.
- Isolated Blazingstar - Mentzelia Isolata Gentry
- Isolepis Fluitans (L.) R. Br.
- Isolepis Funckii Steud.
- Isolepis Junciformis Kunth
- Isolepis Koilolepis Steud.
- Isolepis Pseudosetacea (Daveau) Gand.
- Isolepis Vestita Kunth
- Isolepis Warei Torr.
- Isomeris Arborea Nutt.
- Isomeris Arborea Nutt. var. angustata Parish
- Isomeris Arborea Nutt. var. globosa Coville
- Isomeris Arborea Nutt. var. insularis Jeps.
- Isonandra Gutta Hook. f.
- Isopappus Divaricatus (Nutt.) Torr. & A. Gray
- Isopappus Hookerianus Torr. & A. Gray
- Isopappus Validus Rydb.
- Isopogon Buxifolius R. Br.
- Isopogon Cuneatus R. Br.
- Isopogon Formosus R. Br.
- Isopterygiopsis Moss - Isopterygiopsis Alpicola (Lindb. ex Lindb. & Arnell) Hedenäs
- Isopterygiopsis Moss - Isopterygiopsis Pulchella (Hedw.) Z. Iwats.
- Isopterygiopsis Moss - Isopterygiopsis Z. Iwats.
- Isopterygium Alpicola (Lindb. ex Lindb. & Arnell) Nyholm
- Isopterygium Borrerianum (Müll. Hal.) Lindb.
- Isopterygium Borrerianum (Müll. Hal.) Lindb. var. gracilens (Austin ex Grout) H.A. Crum,
- Isopterygium Borrerianum (Müll. Hal.) Lindb. var. terrestre (Lindb.) H.A. Crum, Steere &
- Isopterygium Cuspidifolium Cardot
- Isopterygium Distichaceum (Mitt.) A. Jaeger
- Isopterygium Drummondii H.A. Crum, Steere & L.E. Anderson
- Isopterygium Elegans (Brid.) Lindb.
- Isopterygium Elegans (Brid.) Lindb. var. gracilens Austin ex Grout
- Isopterygium Elegans (Brid.) Lindb. var. schimperi (Jur. & Milde) Limpr.
- Isopterygium Elegans (Brid.) Lindb. var. terrestre (Lindb.) Wijk. & Margad.
- Isopterygium Fulvum (A. Jaeger) Kindb.
- Isopterygium Homomallifolium Redf.
- Isopterygium Latebricola (Schimp.) Delogne
- Isopterygium Micans (Sw.) Kindb.
- Isopterygium Micans (Sw.) Kindb. var. groutii (Cardot & Thér.) Grout
- Isopterygium Micans (Sw.) Kindb. var. latifolium (Grout) Schornh.
- Isopterygium Micans (Sw.) Kindb. var. minus (Grout) H.A. Crum & L.E. Anderson
- Isopterygium Moss - Isopterygium Mitt.
- Isopterygium Moss - Isopterygium Tenerum (Sw.) Mitt.
- Isopterygium Muellerianum (Schimp.) A. Jaeger
- Isopterygium Nitidulum (Wahlenb.) Kindb.
- Isopterygium Nitidum Lindb.
- Isopterygium Piliferum (Sw. ex Hartm.) Loeske
- Isopterygium Pulchellum (Hedw.) A. Jaeger
- Isopterygium Pulchellum (Hedw.) A. Jaeger var. nitidulum (Wahlenb.) G. Roth
- Isopterygium Seligeri (Brid.) Dix.
- Isopterygium Silesiacum (Selig. ex P. Beauv.) Kindb.
- Isopterygium Striatellum (Brid.) Loeske
- Isopterygium Subfalcatum (Austin) A. Jaeger
- Isopterygium Turfaceum (Lindb.) Lindb.
- Isopyrum Biternatum (Raf.) Torr. & A. Gray
- Isopyrum Hallii A. Gray
- Isopyrum Occidentale Hook. & Arn.
- Isopyrum Savilei Calder & Roy L. Taylor
- Isopyrum Stipitatum A. Gray
- Isothecium Brachycladon Kindb.
- Isothecium Brewerianum (Lesq.) Kindb.
- Isothecium Cardotii Kindb.
- Isothecium Cristatum (Hampe) H. Rob. var. howei (Kindb.) H.A. Crum, Steere & L.E. And
- Isothecium Cristatum (Hampe) H. Rob. var. lutescens (Lesq. & James) H.A. Crum, Steere
- Isothecium Eumyosuroides Dix.
- Isothecium Eumyosuroides Dix. var. cavernarum (Molendo) H.A. Crum, Steere & L.E. Anderson
- Isothecium Moss - Isothecium Alopecuroides (Dubois) Isov.
- Isothecium Moss - Isothecium Brid.
- Isothecium Moss - Isothecium Cristatum (Hampe) H. Rob.
- Isothecium Moss - Isothecium Myosuroides Brid.
- Isothecium Moss - Isothecium Obtusatulum Kindb.
- Isothecium Myosuroides Brid. var. cavernarum Molendo
- Isothecium Spiculiferum (Mitt.) Renauld & Cardot
- Isothecium Spiculiferum (Mitt.) Renauld & Cardot var. cardotii (Kindb.) H.A. Crum, Steer
- Isothecium Spiculiferum (Mitt.) Renauld & Cardot var. myurellum (Kindb.) Wijk & Margad.
- Isothecium Stoloniferum Brid.
- Isothecium Stoloniferum Brid. var. cardotii (Kindb.) Wijk & Margad.
- Isothecium Stoloniferum Brid. var. myurellum (Kindb.) Wijk & Margad.
- Isothecium Stoloniferum Brid. var. spiculiferum (Mitt.) R.D. Williams & W.B. Schofield
- Isothecium Stoloniferum Brid. var. thamnoides (Kindb.) Wijk & Margad.
- Isothecium Thamnoides Kindb.
- Isotoma Longiflora (L.) C. Presl
- Isotrema Californica (Torr.) Huber
- Isotrema Macrophyllum (Lam.) C.F. Reed
- Isotrema Tomentosa (Sims) Huber
- Isotrema Tomentosum (Sims) H. Huber
- Israel Clover - Trifolium Israeliticum Zohary & Katzn.
- Italian Alder - Alnus Cordata (Loisel.) Duby
- Italian Aster - Aster Amellus L.
- Italian Buckthorn - Rhamnus Alaternus L.
- Italian Bugloss - Anchusa Azurea Mill.
- Italian Catchfly - Silene Italica (L.) Pers.
- Italian Catchfly - Silene Italica (L.) Pers. ssp. nemoralis (Waldst. & Kit.) Nyman
- Italian Cornsalad - Valerianella Eriocarpa Desv.
- Italian Cypress - Cupressus Sempervirens L.
- Italian Gladiolus - Gladiolus Italicus Mill.
- Italian Hawksbeard - Crepis Bursifolia L.
- Italian Hedgenettle - Stachys Ocymastrum (L.) Briq.
- Italian Leather Flower - Clematis Viticella L.
- Italian Lords And Ladies - Arum Italicum Mill.
- Italian Oak - Quercus Frainetto Ten.
- Italian Plumeless Thistle - Carduus Pycnocephalus L.
- Italian Ryegrass - Lolium Perenne L. ssp. multiflorum (Lam.) Husnot
- Italian Stone Pine - Pinus Pinea L.
- Italian Timothy - Phleum Subulatum (Savi) Asch. & Graebn.
- Italian Toadflax - Linaria Angustissima (Loisel.) Borbás [excluded]
- Italian Viper's Bugloss - Echium Italicum L.
- Italian Woodbine - Lonicera Caprifolium L.
- Itchgrass - Rottboellia Cochinchinensis (Lour.) W.D. Clayton
- Itchgrass - Rottboellia L. f.
- Ithaca Blackberry - Rubus Ithacanus L.H. Bailey
- Ithuriel's Spear - Triteleia Laxa Benth.
- Itol - Clematis Smilacifolia Wall.
- Iva Acerosa (Nutt.) R.C. Jacks.
- Iva Ambrosiifolia (A. Gray) A. Gray
- Iva Ambrosiifolia (A. Gray) A. Gray ssp. lobata (Rydb.) R.C. Jacks.
- Iva Angustifolia Nutt. ex DC. var. latior Shinners
- Iva Axillaris Pursh ssp. robustior (Hook.) Bassett
- Iva Axillaris Pursh var. robustior Hook.
- Iva Caudata Small
- Iva Ciliata Willd.
- Iva Ciliata Willd. var. macrocarpa S.F. Blake
- Iva Dealbata A. Gray
- Iva Frutescens L. var. oraria (Bartlett) Fernald & Grisc.
- Iva Nevadensis M.E. Jones
- Iva Xanthifolia Nutt.
- Ives' Fournerved Daisy - Tetraneuris Ivesiana Greene
- Ives' Phacelia - Phacelia Ivesiana Torr.
- Ives' Phacelia - Phacelia Ivesiana Torr. var. ivesiana
- Ives' Phacelia - Phacelia Ivesiana Torr. var. pediculoides J.T. Howell
- Ivesia Baileyi S. Watson ssp. setosa (S. Watson) D.D. Keck
- Ivesia Baileyi S. Watson ssp. typica D.D. Keck
- Ivesia Eremica (Coville) Rydb.
- Ivesia Kingii S. Watson var. eremica (Coville) Ertter
- Ivesia Kingii S. Watson var. kingii
- Ivesia Lemmonii S. Watson
- Ivesia Lycopodioides A. Gray ssp. typica D.D. Keck
- Ivesia Purpurascens (S. Watson) D.D. Keck
- Ivesia Purpurascens (S. Watson) D.D. Keck ssp. congdonis (Rydb.) D.D. Keck
- Ivesia Setosa (S. Watson) Rydb.
- Ivey's Twinpod - Physaria Iveyana O'Kane, K.N. Sm. & K.A. Arp
- Ivory Coast Almond - Terminalia Ivorensis A. Chev.
- Ivory Coast Raphia Palm - Raphia Hookeri G. Mann & H.A. Wendl.
- Ivory Nut Palm - Phytelephas Macrocarpa Ruiz & Pav.
- Ivy Broomrape - Orobanche Hederae Duby
- Ivy Buttercup - Ranunculus Hederaceus L.
- Ivy Gourd - Coccinia Grandis (L.) Voigt
- Ivy - Hedera L.
- Ivyleaf Geranium - Pelargonium Peltatum (L.) L'Hér. ex Aiton
- Ivyleaf Groundcherry - Physalis Hederifolia A. Gray
- Ivyleaf Groundcherry - Physalis Hederifolia A. Gray var. comata (Rydb.) Waterf.
- Ivyleaf Groundcherry - Physalis Hederifolia A. Gray var. hederifolia
- Ivyleaf Maple - Acer Cissifolium (Siebold & Zucc.) K. Koch
- Ivyleaf Morning-glory - Ipomoea Hederacea Jacq.
- Ivyleaf Speedwell - Veronica Hederifolia L.
- Ivyleaf Thoroughwort - Chromolaena Ivifolia (L.) R.M. King & H. Rob.
- Iwarancusa Grass - Cymbopogon Jwarancusa (Jones) Schult.
- Iwatsukiella Moss - Iwatsukiella Leucotricha (Mitt.) W.R. Buck & H.A. Crum
- Iwatsukiella Moss - Iwatsukiella W.r. Buck & H.A. Crum
- Ixbut - Euphorbia Lancifolia Schltdl.
- Ixeris - Ixeris (cass.) Cass.
- Ixia Acuta Bartram, non Licht. ex Roem. & Schult., nom. illeg.
- Ixia Coelestina W. Bartram
- Ixia Rosea L.
- Ixia Speciosa Andrews
- Ixidium Wrightii (Griseb.) Eichl.
- Ixora Arborea Sm.
- Ixora Chinensis sensu Stone p.p., non Lam.
- Ixora Coccinea L. var. coccinea
- Ixora Finlaysoniana Wall. ex G. Don
- Ixora Grandiflora Zoll. & Moritzi [excluded]
- Ixora - Ixora L.
- Ixora Macrothyrsa Teijsm. & Binn.
- Ixora Occidentalis L.
- Ixora Parviflora Vahl
- Ixora Triantha Volkens
Copyright ©2022 - All rights reserved.