Nomenclature
Rudbeckia Linnaeus, Sp. Pl. 2: 906. 1753.
List of Rudbeckia Species
References to Rudbeckia
- Cox, P. B. 1994. A taxonomic revision of Rudbeckia subg. Macrocline (Asteraceae: Heliantheae: Rudbeckiinae). Castanea 59: 300-318.
- Foote, K. 2002. Black-eyed susan (Rudbeckia hirta L.). New York Flora Association Newsletter 13: 1-6.
- Harkess, R. L.; Lyons, R. E. 1994. Floral initiation in Rudbeckia hirta (Asteraceae) under limited inductive photoperiodic treatments. Amer. J. Bot. 81: 1021-1026.
- Perdue, R. E. 1957. Synopsis of Rudbeckia subgenus Rudbeckia. Rhodora 59: 293-299.
- Urbatsch, L.; Baldwin, B. G.; Donoghue, M. J. 2000. Phylogeny of the coneflowers and relatives (Heliantheae: Asteraceae) based on nuclear rDNA internal transcribed spacer (ITS) sequences and chloroplast DNA restriction site data. Syst. Bot. 25: 539-565.