Genus of North American plants in family Asteraceae; contain an unidentified toxin which causes incoordination, abdominal pain, diarrhea; includes R. hirta (black-eyed Susan), R. laciniata (golden glow, thimble weed, cone flower), R. occidentalis (western cone flower).
Rudbeckia
| Veterinary Dictionary: Rudbeckia |
| 5min Related Video: Rudbeckia |
| Annuals Dictionary: Rudbeckia |
Daisy family
Compositae
Rood-beck'i-a. Coneflower . North American hardy herbs, comprising about 25 species.
Description
Leaves usually alternate, simple or compound, in some species much cut and lance-shaped, veins prominent, margins deeply toothed toward the tip. Flowers in terminal or axillary heads, generally yellow, in most species the disk flowers being brown or black.
How to Grow
Easy to grow. Sow outdoors in warm soil. Where growing season is short, start seeds indoors 8-10 weeks before last spring frost. Seedlings transplant easily. Plants grow rather large and should be set 18 in. (45 cm) apart. They prefer warm weather.
Rudbeckia hirta
Black-eyed Susan
. 1-3 ft. (30-90 cm) high, covered with short stiff hairs. Flowers daisylike, 2-3 in. (5.0-7.5 cm) wide, ray flowers yellow, disk flowers purplish brown. Originally restricted to the Midwest, now naturalized from s. Canada to n. Mexico. Many desirable cultivars have been created by hybridizing
R. hirta
and by breeding for tetraploid forms such as the 'Gloriosa Daisy' below. In the process, a rough-looking wildflower has become a mainstay in summer gardens. Very resistant to heat and drought. Short-lived perennial grown as a half-hardy annual.
Rudbeckia hirta'Gloriosa Daisy'
2-3 ft. (60-90 cm) high. Flowers to 6 in. (15 cm) wide, from yellow and gold to mahogany, red, or bicolored. Some with double or semidouble blossoms. Short-lived perennial grown as a half-hardy annual.
| Gardener's Dictionary: Rudbeckia |
| WordNet: Rudbeckia |
Note: click on a word meaning below to see its connections and related words.
The noun has one meaning:
Meaning #1:
North American perennial herbs with showy cone-shaped flower heads
Synonym: genus Rudbeckia
| Wikipedia: Rudbeckia |
| Rudbeckia | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Rudbeckia hirta ("Black-eyed Susan") flowerhead
|
||||||||||||||||||
| Scientific classification | ||||||||||||||||||
|
||||||||||||||||||
| Species | ||||||||||||||||||
|
See text. |
Rudbeckia (pronounced /rʌdˈbɛkiə/)[1] is one of at least four genera within the flowering plant family Asteraceae whose members are commonly known as coneflowers; the others are Echinacea, Dracopis and Ratibida.
They are herbaceous, mostly perennial plants (some annual or biennial) growing to 0.5-3 m tall, with simple or branched stems. The leaves are spirally arranged, entire to deeply lobed, 5-25 cm long. The flowers are produced in daisy-like inflorescences, with yellow or orange florets arranged in a prominent, cone-shaped head; "cone-shaped" because the ray florets tend to point out and down (are decumbent) as the flower head opens.
A large number of species have been proposed within Rudbeckia, but most are now regarded as synonyms of the limited list given below. Several of these currently accepted species have several accepted varieties. Some of them (for example the Black-eyed Susan, R. hirta), are popular garden flowers, distinguished for their long flowering times. There are many cultivars of these species.
Rudbeckia species are used as food plants by the larvae of some Lepidoptera species including Cabbage Moth and Dot Moth.
The name was given by Carolus Linneaus in honor of his teacher at Uppsala University, Professor Olof Rudbeck the Younger (1660-1740), and his father, Professor Olof Rudbeck the Elder (1630-1702), both of whom were botanists.
- Species
- Rudbeckia alpicola Showy Coneflower
- Rudbeckia auriculata Eared Coneflower
- Rudbeckia bicolor Pinewoods Coneflower
- Rudbeckia californica California Coneflower
- Rudbeckia fulgida Orange Coneflower
- Rudbeckia glaucescens Waxy Coneflower
- Rudbeckia graminifolia Grassleaf Coneflower
- Rudbeckia grandiflora Rough Coneflower
- Rudbeckia heliopsidis Sunfacing Coneflower
- Rudbeckia hirta Black-eyed Susan
- Rudbeckia klamathensis Klamath Coneflower
- Rudbeckia laciniata Cutleaf Coneflower, Green-head Coneflower
- Rudbeckia maxima Great Coneflower
- Rudbeckia missouriensis Missouri Coneflower
- Rudbeckia mohrii Mohr's Coneflower
- Rudbeckia mollis Softhair Coneflower
- Rudbeckia montana Montane Coneflower
- Rudbeckia nitida Shiny Coneflower
- Rudbeckia occidentalis Western Coneflower
- Rudbeckia pinnata Grey-headed Coneflower
- Rudbeckia scabrifolia Roughleaf Coneflower
- Rudbeckia serotina
- Rudbeckia speciosa Showy Coneflower
- Rudbeckia subtomentosa Sweet Coneflower
- Rudbeckia texana Texas Coneflower
- Rudbeckia triloba Brown-eyed Susan
Uses
Many species are used in prairie restorations and for ornamental use. Used by domestic stock for forage. An abundance of these plants on a rangeland indicates good health.
 Rudbeckia hirta |
 Prairie restoration |
 "Hirta" |
References
- ^ Sunset Western Garden Book, 1995:606–607
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
| Shopping: Rudbeckia |
Learn More
 | golden glow |
| thimbleweed |
| coneflower |
 | North american plant of the genus rudbeckia? Read answer... |
| Are black eyed susans and Rudbeckia hirta the same? Read answer... |
| What is rudbeckia hirta? Read answer... |
Help us answer these
 | How do you get rid of Rudbeckia? |
| Where is the do you plant rudbeckias? |
| When do you plant Rudbeckia plant? |
Post a question - any question - to the WikiAnswers community:
Copyrights:
 |
 | Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more |
 |
| Annuals Dictionary. Taylor's Guide for Annuals, by Norman Taylor, revised and edited by Gordon P. DeWolf, Jr. Copyright © 1986 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
|
| Gardener's Dictionary. Taylor's Dictionary for Gardeners, by Frances Tenenbaum. Copyright © 1997 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
 |
| WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. Read more |
 |
| Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Rudbeckia". Read more |
Related answers
- What is rudbeckia hirta?
- When do you plant Rudbeckia Seeds?
- What do rudbeckia seeds look like?
- How do I get rid of Rudbeckia mold?
ADVERTISEMENT
Answer these
- How do you get rid of Rudbeckia?
- Where is the do you plant rudbeckias?
- When do you plant Rudbeckia plant?
Mentioned in
- hirtus
- black-eyed Susan (North American herbs of the genus Rudbeckia)
- Echinacea
- cone
- Rudbeckia triloba
- Rudbeckia alpicola
- Brown-eyed Susan
- Rudbeckia maxima
- Rudbeckia hirta
- Rudbeckia pinnata
