Genus: Ratibida
Nomenclature
Ratibida Rafinesque, Fl. Ludov., 73. 1817.List of Ratibida Species
General Discussion
Ratibida columnifera (Nutt.) Wooton & Standl. and Ratibida pinnata (Vent.) Barnh., both native to the midwestern United States, have been purported to have been introduced in our area. However, the handful of reports from our area are ambiguous regarding their cultivated status. Further research is needed to determine if these species are truly naturalizing.
References to Ratibida
- Baskin, C. C. et.al. 1993. Afterripening pattern during cold stratification of achenes of ten perennial Asteraceae from eastern North America, and evolutionary implication. Plant Species Biol. 8: 61-65.
- Richards, E. L. 1968. A monograph of the genus Ratibida. Rhodora 70: 348-393.
- 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.