Rudbeckia fulgida var. speciosa

(Wenderoth) Perdue

Rhodora 59: 297. 1958.

Common names: Showy coneflower
Basionym: Rudbeckia speciosa Wenderoth Index Sem. (Marburg). 1828
Treatment appears in FNA Volume 21. Treatment on page 55. Mentioned on page 54.

Stems glabrous or sparsely villous-hirsute (hairs spreading). Leaves: basal blades broadly lanceolate to ovate, 2–6.5 cm wide, lengths to 2 times widths, bases mostly rounded, margins entire or crenate, faces sparsely to moderately hairy; cauline petiolate (proximal) or ± sessile (distal), elliptic to lanceolate (becoming somewhat panduriform distally), not notably smaller distally, bases cuneate, attenuate, or auriculate, margins coarsely serrate to lacerate, faces scabrous to strigose. Phyllaries reflexed, 1–2.2 × 0.2–0.7 cm, glabrous or sparsely hairy. Receptacles 11–18 mm diam.; palea margins ciliate, faces glabrous. Ray florets 12–21; laminae 20–40 mm. 2n = ca. 76.

Phenology: Flowering summer–fall.
Habitat: Mesic open woodlands
Elevation: 30–200 m



Ont., Que., Ala., Ark., Conn., Del., Ga., Ill., Ky., Mass., Mich., Mo., N.J., N.Y., Ohio, Pa., Va., W.Va., Wis.


Variety speciosa has rarely been introduced in Canada.

Selected References


Lower Taxa

Lowell E. Urbatsch +  and Patricia B. Cox +
(Wenderoth) Perdue +
Rudbeckia speciosa +
Showy coneflower +
Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ky. +, Mass. +, Mich. +, Mo. +, N.J. +, N.Y. +, Ohio +, Pa. +, Va. +, W.Va. +  and Wis. +
30–200 m +
Mesic open woodlands +
Flowering summer–fall. +
Compositae +
Rudbeckia fulgida var. speciosa +
Rudbeckia fulgida +
variety +