Rudbeckia fulgida var. speciosa

(Wenderoth) Perdue

Rhodora 59: 297. 1958.

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

Distribution

V21-114-distribution-map.gif

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

Discussion

Variety speciosa has rarely been introduced in Canada.

Selected References

None.

Lower Taxa

None.
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 +