Rudbeckia grandiflora

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Rudbeckia grandiflora
Rudbeckia grandiflora var. alismifolia.jpg
Scientific classification edit
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 aster 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]

  • R. grandiflora var. alismifolia - Stems glabrous or sparsely pubescent, with hairs ascending an less than 0.5 mm
  • R. grandiflora var. grandiflora - Stems with regular spreading hairs over 1 mm

References[]

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