Vernonia arkansana

de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 264. 1838.

IllustratedEndemic
Synonyms: Vernonia crinita Rafinesque
Treatment appears in FNA Volume 19. Treatment on page 208. Mentioned on page 207.

Plants 8–12(–20) dm. Stems scabrellous to pilosulous, glabrescent. Leaves mostly cauline; blades lance-linear, 6–14(–20) cm × 7–15(–25) mm, l/w = 7–10(–18), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted, adaxially scaberulous, glabrescent, resin-gland-dotted. Heads in ± corymbiform arrays. Peduncles 2–5 cm. Involucres ± hemispheric, 11–15 × 11–15 mm. Phyllaries (50–)60–70+ in 5–6 series, scabrellous (and resin-gland-dotted), margins ciliolate, the outer lance-ovate, 3–8+ mm, inner lanceolate, 12–15 mm, tips subulate to filiform. Florets 50–100+. Cypselae 3–5 mm; pappi fuscous to purplish, outer scales 25–30+, 0.5–1 mm, contrasting with 25–30+, 5–7 mm inner bristles. 2n = 34.


Phenology: Flowering Aug–Oct.
Habitat: Leas, roadsides, stream banks, in sand or on limestone
Elevation: 200–300 m

Discussion

Vernonia arkansana was published in April, V. crinita in October 1838.

Selected References

None.

Lower Taxa

None.
... more about "Vernonia arkansana"
John L. Strother +
de Candolle +
Ark. +, Kans. +, Mo. +  and Okla. +
200–300 m +
Leas, roadsides, stream banks, in sand or on limestone +
Flowering Aug–Oct. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Illustrated +  and Endemic +
Vernonia crinita +
Vernonia arkansana +
Vernonia +
species +