Vernonia gigantea

(Walter) Branner & Coville

Rep. (Annual) Arkansas Geol. Surv. 4: 189. 1891.

Endemic
Basionym: Chrysocoma gigantea Walter Fl. Carol., 196. 1788
Synonyms: Vernonia altissima Nuttall Vernonia altissima var. taeniotricha S. F. Blake Vernonia gigantea subsp. ovalifolia (Torrey & A. Gray) Urbatsch Vernonia ovalifolia
Treatment appears in FNA Volume 19. Treatment on page 212. Mentioned on page 208.

Plants 8–20(–30+) dm. Stems puberulent, glabrescent. Leaves mostly cauline; blades ± lanceolate, 12–25+ cm × 20–60+ mm, l/w = (3.5–)4–7+, abaxially scabrellous (hairs awl-shaped), sometimes glabrescent, not or sparsely resin-gland-dotted, adaxially strigillose, glabrescent, not resin-gland-dotted. Heads in corymbiform-scorpioid arrays. Peduncles 1–12(–20+) mm. Involucres broadly campanulate to hemispheric, 4–5+ × 4–5 mm. Phyllaries 30–40+ in 4–5 series, glabrate, margins ciliolate, the outer lance-ovate, 1–2 mm, inner oblong, 3.5–5 mm, tips acute or rounded-apiculate. Florets (9–)18–24(–30). Cypselae 2.5–3.5 mm; pappi usually purplish, sometimes stramineous, outer scales 20–25, 0.5–1 mm, contrasting with 35–40+, 4.5–6+ mm inner bristles. 2n = 34.


Phenology: Flowering Jun–Sep.
Habitat: Flood plains
Elevation: 10–300 m

Distribution

V19-265-distribution-map.gif

Ont., Ala., Ark., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mich., Miss., Mo., Nebr., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Vernonia gigantea"
John L. Strother +
(Walter) Branner & Coville +
Chrysocoma gigantea +
Ont. +, Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
10–300 m +
Flood plains +
Flowering Jun–Sep. +
Rep. (Annual) Arkansas Geol. Surv. +
Vernonia altissima +, Vernonia altissima var. taeniotricha +, Vernonia gigantea subsp. ovalifolia +  and Vernonia ovalifolia +
Vernonia gigantea +
Vernonia +
species +