Rudbeckia purpurea L.

Scientific Name: Rudbeckia purpurea L.

Rudbeckia purpurea L.

General Information
Usda Symbol	RUPU9
Group	Dicot
Life Cycle	Perennial
Growth Habits	Forb/herb
Native Locations	RUPU9

Plant Guide

Alternative Names

echinacea, snakeroot, Kansas snakeroot, narrow-leaved purple coneflower, scurvy root, Indian head, comb flower, black susans, and hedge hog

Uses

Ethnobotanic: Purple coneflower (Echinacea purpurea) was and still is a widely used medicinal plant of the Plains Indians. It was used as a painkiller and for a variety of ailments, including toothache, coughs, colds, sore throats, and snake bite (Kindscher 1992). The Choctaw use purple coneflower as a cough medicine and gastro-intestinal aid (Moerman 1986). The Delaware used an infusion of coneflower root for gonorrhea and found it to be highly effective. The purple coneflower was the only native prairie plant popularized as a medicine by folk practitioners and doctors. It was used extensively as a folk remedy (Kindscher 1992). Purple coneflower root was used by early settlers as an aid in nearly every kind of sickness. If a cow or a horse did not eat well, people administered Echinacea in its feed. Echinacea is widely used as an herbal remedy today. A purple coneflower product containing the juice of the fresh aerial parts of Echinacea purpurea was found to make mouse cells 50-80 percent resistant to influenza, herpes, and vesicular somatitis viruses. This product was available in Germany in 1978 (Wacker and Hilbig 1978). Perhaps the most important finding so far is the discovery of immuno-stimulatory properties in Echinacea purpurea and E. angustifolia (Wagner and Proksch 1985, Wagner et al. 1985). Stimulation of the immune system appears to be strongly influenced by dose level. Recent pharmacological studies indicate that a 10-mg/kg daily dose of the polysaccharide over a ten-day period is effective as an immuno-stimulant. Increases in the daily dosage beyond this level, however, resulted in “markedly decreased pharmacological activity” (Wagner and Proksch 1985, Wagner et al. 1985). Other research has shown that the purple coneflower produces an anti-inflammatory effect and has therapeutic value in urology, gynecology, internal medicine, and dermatology (Wagner and Proksch 1985). From TAMU-BWG Digital Library - Vascular Plant Images Ornamental: The purple coneflower is often grown simply for its ornamental value, especially for its showy flowers. The best possibility for obtaining a new cultivar is in the hybrids between Echinacea purpurea and E. angustifolia var. angustifolia, whose progeny are compact, rounded, and bushy plants about two feet in diameter (McGregor 1968).

Status

Please consult the PLANTS Web site and your State Department of Natural Resources for this plant’s current status, such as, state noxious status and wetland indicator values.

Description

General: Sunflower Family (Asteraceae). Echinacea purpurea is a perennial herb 1.5-6 dm (0.5-2 ft) tall, with a woody rhizome or tough caudex. The plant has one to several rough-hairy stems, mostly unbranched. Basal and lower cauline leaf blades are ovate to ovate-lanceolate with serrate edges, up to 2 dm long and 1.5 dm wide, and slightly heart-shaped at the base. Cauline leaves are similar but become smaller as they extend up the stem. The flowers are in heads like sunflowers with the disk up to 3.5 cm across. The drooping ray florets have ligules 3-8 cm long, and are reddish-purple, lavender, or rarely pink. The disk florets are 4.5-5.5 mm long, and are situated among stiff bracts. Flowers bloom from June to August. Pollen grains are yellow. Fruits are small, dark, 4-angled achenes.

Distribution

The purple coneflower grows in rocky prairie sites in open, wooded regions. Echinacea purpurea extends eastward through the Great Plains bioregion from northeast Texas, Missouri, and Michigan. For current distribution, please consult the Plant Profile page for this species on the PLANTS Web site.

Establishment

Native Echinacea species are dwindling in the wild from loss of habitat and over-harvesting. E. purpurea is not as threatened as E. angustifolia. In the wild, E. purpurea grows sporadically along waterways, with a few scattered individuals. Plant densities are too low for efficient harvest for commercial purposes. E. purpurea is the most widely adaptable species for cultivation. It is cold and heat hardy, easy to grow, and boasts high yields. Bioactive constituents of E. purpurea compare favorably with E. angustifolia, although there are proportional differences. E. angustifolia has more of the alkylamides, while E. purpurea has more of the equally immune enhancing caffeic acid derivatives. They are both effective medicines. A combination of both probably affords the most broad-spectrum immune-enhancing effect. Historically, E. purpurea was rarely utilized by pharmaceutical companies. It takes three to four years for roots to reach harvestable size (Foster 1991). Yields for cultivated, dried roots of three-year-old Echinacea purpurea grown at Trout Lake, Washington, were 131 kg/ha (1,200 lbs/acre) (Foster 1991). According to Richo Cech (1995), a mature two-year old E. purpurea plant yields 2.25 pounds of fresh flowering aerial portions and 0.5 pounds of fresh root per plant. Propagation from Cuttings Purple coneflower can be propagated by division of the crowns. This technique results in stronger plants initially and eliminates the tedious nurturing and tending of the slow-growing seedlings (Kindscher 1992). Harvest roots when plants are dormant, when leaves begin to turn brown. Wash roots and remove most for use. Then carefully divide the crown by hand to make one to five “plantlets.” Replant the divisions as soon as possible. It is important that they don’t dry out, so if replanting is delayed a couple of hours, dip the plants briefly in water and keep them in a sealed plastic bag in a cool, shady place until you are ready to replant them. When replanting, ensure that the remaining fine roots are well spread out in the planting hole and the soil is pressed firmly around the plant. These plantlets can be grown in flats in the greenhouse during the winter to re-establish their root systems, then replanted in the field the following spring for another round of production.

Seed Propagation

Propagation

Propagation

• Echinacea purpurea seed is easy to germinate. The following information is provided by Richo Cech (1995). • The seed can be spring-planted without cold, or cold stratification, to germinate. • Propagation is easily done in flats, which are sown with approximately ¼ ounce of seed per flat, evenly sprinkled on the surface and covered with about ¼ inch of potting soil. • The flats are left outdoors through the winter and watered if necessary. • A light screen over the flats will diminish the severity of heavy rain and snow, and will also keep out cats. • Spring germination can be greatly enhanced by bringing the flat of cold-conditioned seed into the greenhouse, whereupon rapid germination may be expected. • Once the second set of true leaves appears, the seedlings are put into pots or are spaced at approximately two inch centers in another deep flat. Seedlings must be carefully weeded and watered. • In late spring or early summer, the hardy seedlings, now with a four-to-six inch root system, may be transplanted into the field or garden one or two feet apart. • Regular spacing with one foot between the plants and two feet between the rows will result in approximately 21, 800 plants per acre. A generous two-foot spacing with three feet between the rows will result in approximately 7,500 plants per acre. • Timely watering during dry periods greatly increases the size of this plant. A sparing side dressing of organic compost, usually in the mid-spring, will assist this sometimes slow-growing herbaceous perennial in outranking competitive weeds. An ounce of well-cleaned E. purpurea seed contains approximately 6,000 seeds. A pound contains around 96,000 seeds. Given a normal spacing of one foot between the plants and two feet between the rows, an acre would contain 21,800 plants. Given a 68% germination rate, a pound of good seed could produce three acres of plants. This same acre, dormant harvested for the roots at the end of the second year of growth, would produce (at 1/2 lb. per root) 10,900 lbs of fresh root.

Harvesting and Processing the Seed

• Seed can be harvested during the fall of the second year. Harvest the seed in autumn when seeds are ripe, before the fall rains set in. Seed should be from the largest and most vital plants. • Stop watering when the seeds begin to mature – excessive watering at this stage is not needed and it may damage the seed crop. • Snip the cone-heads off and put them in buckets. If the seed is still a little green, dry the cone-heads in the sun. • Separate the seed from the chaffy debris. It is important to break up the cone-heads without damaging the seed. Run the seed through a hammer mill or compost chopper at low RPM through a one-inch screen. Then pass the seed and chaff through a ¼ inch stationary screen. Shake the remaining seed and chaff through a screen that is too small for the seed to pass. What you have left is the seed with only the chaff that is the same size as the seed. • Lay out a flannel sheet and pour a cupful of the seed/chaff along the edge. Lift the top edge of the sheet and roll the seed to the other end where your partner is waiting to carefully funnel the seed into a bowl. • Make sure the seed is thoroughly dry. Store in plastic bags in a cool, dry, and dark place. Plastic bags allow the seed to respire, while glass does not. Seed thus stored remains viable for about three years.

Management

Herbivores, such as insects and deer, are not a problem with Echinacea, Gophers and moles can be a problem as they eat the roots, Goldfinches love the Echinacea seed crop and can clear out all the seed in a few days, Cultivars, Improved and Selected Materials (and area of origin) ECPU is widely available through most nurseries and seed companies, Contact your local Natural Resources Conservation Service (formerly Soil Conservation Service) office for more information, Look in the phone book under ”United States Government, Use soil moisture sensors to measure the soil moisture of Rudbeckia purpurea L..,” The Natural Resources

Conservation

Service will be listed under the subheading “Department of Agriculture.” Cultivars: King, Sombrero, Alba, Bright Star Leuchste, Crimson Star, Magnus, Ovation, Springbrook’s Crimson Star, Talent, Thompson and Morgan Hybrids, White Flower Farm Strain, White Lustre, and White Swan.

References

Cech, R.A. 1995. Echinacea Native American tonic roots. A Horizon Herbs Publication, Williams, Oregon. Foster, S. 1991. Echinacea – nature’s immune enhancer. Healing Arts Press, Rochester, Vermont. Gilmore, M. 1977. Uses of the plants by the Indians of the Missouri River region. University of Nebraska Press, Lincoln, Nebraska. Hart, J.A. 1976. Montana: Native plants and early peoples. Montana Historical Society, Helena, Montana. Hartmann, H. T., D. E. Kester, & F. T. Davies, Jr. 1990. Plant propagation principles and practices. Prentice Hall, Englewood Cliffs, New Jersey. 647 pp. Hutchens, A.R. 1991. Indian herbalogy of North America. Shambhala, Boston and London. pp. 113-117. Isaacson, R. T. 1993. Anderson horticultural library's source list of plants and seeds. Anderson Horticultural Library, University of Minnesota Libraries. Minnesota Landscape Arboretum. 261 pp. Kinscher, K. 1992. Medicinal wild plants of the prairie. An ethnobotanical guide. University Press of Kansas. Pp. 84-94. Martin, A.C., H. S. Zim, & A.L. Nelson 1951. American wildlife and plants. A guide to wildlife food habits. Dover Publications, Inc., New York, New York. 500 pp. McGregor, R.L. T.M. Barkley, R.E. Brooks, & E.K. Schofield (eds.) 1991. Flora of the Great Plains. University Press of Kansas. 1402 pp. McGregor, R.L. 1968. The taxonomy of the genus Echinacea (Compositae). University of Kansas Science Bulletin 48(4):113-142. Michigan State University Extension 1996. Home horticulture: Echinacea purpurea. Version: 000327. <http://www.msue.msu.edu/msue/imp/mod03/01700365.html>. Moerman, D.E. 1986. Medicinal plants of Native America. Research Reports in Ethnobotany, Contribution 2. Technical Reports, Number 19, University of Michigan Museum of Anthropology, Ann Arbor, Michigan. Pp. 156-158. Texas A&M University 1999. TAMU-BWG digital library - vascular plant images. Version: 000327. <http://www.csdl.tamu.edu/FLORA/cgi/gallery_query?q=Echinacea+purpurea>. Bioinformatics Working Group, College Station, Texas. Voaden, D.J. & M. Jacobson 1972. Tumor inhibitors 3. Identification and synthesis of an oncolytic hydrocarbon from American coneflower roots. Journal of Medicinal Chemistry 15(6):619-623. Wagner, H. & A. Proksch 1985. Immunostimulatory drugs of fungi and higher plants. IN: (H. Wagner et al. Eds.) Economic and medicinal plant research. Vol. 1. Academic Press, New York, New York. Pp.113-153 Wagner, H., A. Proksche, I. Riess-Mauere, A. Vollmar, S. Odenthal, H. Stuppner, K. Jurcie, M. Le Turdu, & J.N. Fang 1985. Immunstimulierend wirkende polysaccharide (heteroglykane) aus hoheren pflanzen. Arzneimittel-Forschung 35(8):1069-1075.

Fact Sheet

Alternate Names

Echinacea, snakeroot, Kansas snakeroot, broad-leaved purple coneflower, scurvy root, Indian head, comb flower, black susans, and hedge hog

Uses

Ethnobotanic: Eastern purple coneflower was one of the most important medicinal plants used by Native Americans. It was used by many tribes throughout North America to treat a variety of ailments. It was used as a pain reliever, anti inflammatory, a treatment for toothaches, coughs, colds, and sore throats. It was also used as an antidote for various forms of poisonings, including snake bite. Portions of this plant were used to dress wounds and treat infections. It has been used to soothe gastrointestinal troubles in man and horses. Early pioneers were quick to pick up on healing properties of this species, probably from contact with Native Americans as they traveled west, across the plains. Modern medicine has also seen potential benefits associate with this plant species. Studies have shown eastern purple coneflower to be an immune system booster. It has also shown activity against bacterial and viral infections. Chemical compounds extracted from Echinacea have even shown inhibitory effects against certain forms of cancer. Echinacea is a very popular herbal remedy today, and can be found easily in heath food stores. It is most commonly used to treat the common cold and flu. However, some scientists debate its effectiveness for such use. It should be noted that herbal remedies can interfere with some prescription medication. Allergic reactions have occurred in some individuals. It is recommended that a healthcare professional be consulted before use of such products. Landscaping: Eastern purple coneflower is a popular plant in home gardens and is often grown for its showy flowers. It can be used in pots, as accents in flower beds, or as borders. It can also be used in wildflower mixes for roadside beautification and prairie restoration. Wildlife: Eastern purple coneflower will attract insects and butterflies when in bloom, and song birds, particularly Goldfinches, are fond of its seed in the fall.

Status

Please consult the PLANTS Web site and your State Department of Natural Resources for this plant’s current status (e.g. threatened or endangered species, state noxious status, and wetland indicator values).

Description and Adaptation

Adaptation

Adaptation

Asteraceae Family. Eastern purple coneflower is an erect, long lived, perennial herb that grows one to three feet in height, and produces a woody rhizome. It has a very distinctive flower with reddish-purple petals. The petals may be pink or white in some rare instances. There is a characteristic “cone” at the center of the flower, from which its name is derived. Echinacea is rooted in the Greek word for hedge hog, echinos, in reference to the spiky appearance of the cone. The stems are rough and have small hairs along their entire length. The leaves are alternate, simple, and ovate. Seeds are produced in the cone much like that of a sunflower, and are small, dark, 4 sided achenes. Eastern purple coneflower typically blooms May through June. Eastern purple coneflower can be found throughout most of the eastern and central United States. It can be found as far west as Colorado and north to Wisconsin, Michigan, and New York. It is not present in the extreme north east, and becomes increasingly rare as its range extends westward, past Missouri. This plant prefers full sun, and has a low tolerance of drought conditions. It will grow in a wide range of soil textures, and prefers a pH between 6.5 and 7.2. It will not tolerate water logging, and is most commonly associated with open, upland sites.

Establishment

Seed should be sown in a well prepared, firm, weed free, seedbed at a depth of ⅛ to ¼ inch, If broadcast seeding, a light drag or cultipacker should be used to cover to the seed, Use soil moisture sensors to measure the soil moisture of Rudbeckia purpurea L.., Cold stratification of the seed is reportedly not necessary; however, most sources note that it does improve germination, Cold stratification can be achieved by storing the seed in moist conditions in a cooler or refrigerator for 2 months, or by planting in the fall, If a solid stand of plants is desired, broadcast seeding at a rate of 12-15 pounds of seed per acre should be used, For 36 inch rows, a seeding rate of 3 to 5 pounds per acre will be adequate, In wildflower mixes up to 1 pound of seed per acre may be used, For home applications seed may be germinated in flats, and transplanted into pots or flower gardens, Mature plants may also be divided when dormant and transplanted, This process is done by splitting the dormant crowns into smaller units, and transplanting to desired locations, The rhizomes and roots are very susceptible to drying during the process, They should be transplanted immediately after splitting,

Management

Echinacea does not compete well with other plants. Competition from weeds should be controlled by mechanical or chemical methods. Chemical control can be achieved by application of pre and post-emergent herbicides. (Please read all warnings and labels before making applications and follow the manufacturer’s directions.) Mechanical control can be achieved by mowing above the tops of young plants or cultivation between plants. In general, fertilizer application is not necessary as eastern purple coneflower has low fertility needs. In newly established fields, fertilization will increase weed competition and reduce stands.

Fertilization

should be used sparingly in fields that have been established for 3-4 years.

Pests and Potential Problems

There are no known pests or potential problems associated with this species.

Plant Traits

Growth Requirements

Morphology/Physiology

Reproduction

Suitability/Use

Rudbeckia purpurea L.

Rudbeckia purpurea L.