Rudbeckia hirta L.

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Authors	Title	Year of Publication
N.R.C.S. USDA	The PLANTS Database	2010
J.L. Strother	Flora of North America	2006
L.E. Urbatsch; P.B. Cox	Rudbeckia	2006
M.M. Cimpeanu; C.S. Cimpeanu; G. Capraru; A. Costea	Preliminary Karyotype Analysis in Members of Asteraceae Family	2005
W. Cullina; N.England Wi Society	The New England Wild Flower Society Guide to Growing and Propagating Wildflowers of the United States and Canada: A Guide to Growing and Propagating Native Flowers of North America	2000
N.L. Bradley; C. Leopold; J. Ross; W. Huffaker	Phenological changes reflect climate change in Wisconsin	1999
R.L. Harkess; R.E. Lyons	Floral Initiation in Rudbeckia hirta (Asteraceae) Under Limited Inductive Photoperiodic Treatments	1994
J.S. Al-Atabee; B.J. Mulligan; J.B. Power	Interspecific somatic hybrids ofRudbeckia hirta andR. Laciniata (Compositae)	1990
R.E. Perdue	Synopsis of Rudbeckia Subgenus Rudbeckia	1957
O.A. Farwell	Contributions to the Botany of Michigan, No. 8	1904