Rudbeckia grandiflora
| Rudbeckia grandiflora | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Rudbeckia |
| Species: | R. grandiflora
|
| Binomial name | |
| Rudbeckia grandiflora | |
Rudbeckia grandiflora, commonly called rough coneflower,[1] is a species of flowering plant in the family Asteraceae. It is native to North America, where it is found primarily in the south-central United States, including a disjunct population in northwest Georgia.[2][3] The other populations farther east, all small and isolated, are believed to have originated from human introductions.
Its typical natural habitat is in prairies and open woodlands.[4][5]
Rudbeckia grandiflora is a perennial from a woody base, growing to around 120 cm tall. It produces relatively large inflorescences, with 12-25 yellow ray flowers, each around 3–5 cm long. It blooms from late spring into summer.[4][5]
Taxonomy
Two varieties are recognized:[2][4]
- Rudbeckia grandiflora var. alismifolia - Stems glabrous or sparsely pubescent, with hairs ascending a less than 0.5 mm
- Rudbeckia grandiflora var. grandiflora - Stems with regular spreading hairs over 1 mm
References
- ^ NRCS. "Rudbeckia grandiflora". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 24 January 2019.
- ^ a b Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
- ^ "Rudbeckia grandiflora". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 24 January 2019.
- ^ a b c Rudbeckia grandiflora Flora of North America
- ^ a b Diggs, George; Lipscomb, Barney; O'Kennon, Robert (1999). Flora of North Central Texas. Botanical Research Institute of Texas. p. 402.
