Rudbeckia grandiflora

Rudbeckia grandiflora
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Rudbeckia
Species:
R. grandiflora
Binomial name
Rudbeckia grandiflora
(D. Don) J.F. Gmel. ex DC., 1836

Rudbeckia grandiflora, commonly called rough coneflower,[1] is a species of flowering plant in the family Asteraceae.

Description

Growing wild in Arkansas

It 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.[2][3]

Distribution

It is native to North America, where it is found primarily in the south-central United States, including a disjunct population in northwest Georgia.[4][5] The other populations further east, all small and isolated, are believed to have originated from human introductions.

Its typical natural habitat is in prairies and open woodlands.[2][3]

Taxonomy

Two varieties are recognized:[4][2]

  • 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

  1. ^ NRCS. "Rudbeckia grandiflora". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 24 January 2019.
  2. ^ a b c Rudbeckia grandiflora Flora of North America
  3. ^ a b Diggs, George; Lipscomb, Barney; O'Kennon, Robert (1999). Flora of North Central Texas. Botanical Research Institute of Texas. p. 402.
  4. ^ a b Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
  5. ^ "Rudbeckia grandiflora". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 24 January 2019.