Vernonia acaulis (Walt.) Gleason

Plants 4–6(–10) dm. Stems ± puberulent, glabrescent. Leaves mostly basal; blades oblong-elliptic to spatulate (basal, the distal narrower), 11–25(–30) cm × (21–)60–75+ mm, l/w = 2–4(–5+), abaxially usually glabrous or glabrate, sometimes hirsutulous on veins, usually resin-gland-dotted, adaxially ± scabrellous or glabrate. Heads in loose, corymbiform arrays. Peduncles 5–50 mm. Involucres campanulate to hemispheric, 5–10 × 6–7 mm. Phyllaries 40–60 in 5–6 series, glabrate, margins ciliolate, the outer lance-linear, 2–4 mm, inner lance-ovate to lance-subulate, 5–9 mm, tips subulate to filiform. Florets 30–40(–55+). Cypselae 2.5–3+ mm; pappi whitish to stramineous, outer scales ca. 20, 0.6–1 mm, contrasting with 25–40, 5–7+ mm inner bristles. 2n = 34.

Chrysocoma acaulis Walter, Fl. Carol., 196. 1788

Vernonia acaulis (Walt.) Gleason, Bull. N. Y. Bot
Gard. 4:222. 1906.
Chrysocoma acaulis Walt. Fl. Car. 196. 1788. Vernonia oligophylla Michx. Fl. Bor. Am. 2: 94. 1803. Cacalia acaulis Kuntze, Rev. Gen. 968. 1891.
Stems 3-10 dm. tall, glabrous or thinly puberulent, leafy at base, simple to the inflorescence; basal leaf-blades oblong to obovate, 10-30 cm. long, 2-8 cm. wide, acute, coarsely and irregularly serrate, attenuate at base into a short petiole, sparsely pubescent or scabrellate above, nearly glabrous and glandular-dotted on the lower surface, and pubescent along the veins; cauline leaves much smaller, bractlike, linear-oblong; inflorescence freely branched, loose and open, 1-3 dm. broad, with few 34-flowered heads; involucre broadly campanulate to hemispheric, 5-7 mm. high; scales glabrate or puberulent on the back, thinly arachnoid-ciliate, not resinous, the outer closely appressed at base, caudate-acuminate to a filiform tip, the inner erect, acute to acuminate; achenes strongly ribbed, sparsely pubescent, resinous and dark-dotted, 3 mm. long; pappus pale-tawny, the bristles 5 mm., the scales 0.4-0.8 mm. long.
Type locality: South Carolina.
Distribution: North Carolina, South Carolina, Georgia, and Florida.

Vernonia acaulis is a species of perennial plant in the family Asteraceae. It is native to the U.S.

Vernonia acaulis adalah spesies tumbuhan yang tergolong ke dalam famili Asteraceae. Spesies ini juga merupakan bagian dari ordo Asterales. Spesies Vernonia acaulis sendiri merupakan bagian dari genus Vernonia. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Gleason.

Vernonia acaulis là một loài thực vật có hoa trong họ Cúc. Loài này được (Walter) Gleason miêu tả khoa học đầu tiên năm 1906.