RUDBECKIA
	BY ERIK BOULIER

DESCRIPTION	KEY TO DISTINGUISH SPECIES
GENERAL INFORMATION	SPECIES LIST
PICTURES	REFERENCES
HIGHERTAXON: Asteraceae

DESCRIPTION:
"Perennial, annual, or biennial herbs with or without rhizomes, stems erect, solid glabrous or pubescent, leaves alternate and usually also basal, serrate to crenate, rarely entire, or deeply lobed or dissected. Involucres of 1 or obscurely 2, series of narrow , spreading or reflexed bracts.
Ray flowers sterile, yellow., 2-5 cm long, disc flowers fertile, and yellow or blackish purple.  Receptacle chaffy, nutlets quadrangular, tapered from base to apex, glabrous;"
Radford, A.E., H.E. Ahles & C.R. Bell. 1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press. Chapel Hill, NC.

Back to top

General Information:
Rudbeckia is in the family Compositae, which is also now called Asteraceae. In this family, the flower is normally composed of small true flowers that make up the head and is surrounded by colorful rays. Flowers from this genus are often called coneflowers.
The genus Rudbeckia was named by Linnaeus for two professors of botany named Olaf Rudbeck (1630-1702) and his son, Olaf (1660-1740). Olaf Rudbeck (1630-1702) was the founder of the Uppsala Botanic Garden in Sweden.

Back to top

Species List:

• R. auriculata
• R. fulgida................Goldsturm
• R. graminifolia
• R. granciflora
• R. heliopsidis
• R. hirta....................Black-eyed Susan
• R. laciniata..............Golden Glow
• R. maxima
• R. missouriensis
• R. mohrii
• R. mollis
• R. nitida...................Autumn Sun
• R. submentosa
• R. tribola.................Black-eyed Susan

Back to top

Pictures :

Back to top

References:

1. Bailey, L.H.  1960. The Standard Cyclopedia of Horticulture, VOL III. Macmillian Company, N.Y.

2. Bentham, G. & Hooker, J.D. 1965.  Genera Plantarum, Vol II

3. Cronquist, Arthur. & Gleason, Henry. 1991. Manual of Vascular Plants of Norteastern United States and Adjacent Canada, Vol II. University of North Carolina Press. Chapel Hill, NC.

4. Cronquist, Arthur. 1980. Vascular Flora of the Southeastern United States, Vol I. University of North Carolina Press. Chapel Hill, NC.

5. Holmgren, P.K., N.H. Holmgren & L.C. Barnett. 1990. Index Herbariorium, Part I: The Herbaria of the World Eighth; Edition. International Association for Plant Taxonomy. Bronx, NY.

6. Jones, S.B. & N.C. Coile. 1988. Distribution of the Vascular Flora of Georgia. Dept. of Botany, University of Georgia. Athens, GA.

7. Radford, A.E., H.E. Ahles & C.R. Bell. 1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press. Chapel Hill, NC.

8. Wilkinson, R.E. & Jacques, H.E. 1972. The Weeds. Wm. C. Brown. Co. Dubuque, Iowa.

9. Special thanks to UGA Herbarium for pictures and assistance
Back to top