Vernonia marginata (Torr.) Rafin.

Plants 3–5(–8+) dm. Stems puberulent, glabrescent. Leaves mostly cauline; blades narrowly lanceolate to lance-linear, 5–15+ cm × (2.5–)8–12+ mm, l/w = 8–20(–30+), abaxially glabrate (pitted, awl-shaped hairs in pits), adaxially puberulent, glabrescent (sometimes pitted). Heads in corymbiform arrays. Peduncles (3–)10–35 mm. Involucres narrowly campanulate, (7–)9–11 × 5–6 mm. Phyllaries 35–40+ in 5–6+ series, glabrescent, margins arachno-ciliolate, the outer lance-ovate, 1–2 mm, inner oblong to linear-oblong, 6–9+ mm, tips ± acuminate. Florets 10–25+. Cypselae 4–5 mm; pappi stramineous to purplish, outer subulate scales or bristles 30+, 0.6–2+ mm, intergrading with 40+, 8–9+ mm inner subulate scales or bristles. 2n = 34.

Vernonia altissima Nuttall var. marginata Torrey, Ann. Lyceum Nat. Hist. New York 2: 210. 1827

Vernonia marginata (Torr.) Raf. Atl. Jour. 146. 1832
Vernonia allissima marginata Torr. Ann. Lye. N. Y. 2: 210. 1S27. Vernonia Jamesii T. & G. Fl. N. Am. 2: 58. 1841. Cacalia marginata Kuntze, Rev. Gen. 968. 1891.
Stems erect, simple to the inflorescence or rarely branched, 4-8 dm. high, glabrous or minutely puberulent; leaf-blades pale-green, firm, crowded, linear-lanceolate, 6-10 cm. long, 4-8 mm. wide, acute or acuminate, entire or remotely denticulate, 1 -nerved or with faint lateral veins, glabrous on both sides or scabrellate above, conspicuously pitted beneath; inflorescence flat, compact, 5-15 cm. wide; heads about 18-flowered; involucre campanulate or thickcylindric, 8-10 mm. high; scales appressed, closely and regularly imbricate, glabrous or puberulent on the back, arachnoid-ciliate, purple, the outer triangular-ovate, the inner oblong,
sharply acute to acuminate; achenes glabrous, prominently ribbed, resinous in the furrows,
5 mm. long; pappus purple, the inner bristles 6-7 mm. long, the outer series similar but shorter.
Type locality: Arkansas River [Oklahoma or Kansas]. Distribution: Kansas, Oklahoma, Texas, and New Mexico.

Vernonia tenuifolia Small, Bull. Torrey Club 25: 145. 1898
Stems erect, simple to the inflorescence, 5-10 dm. tall, glabrous; leaves numerous, the blades firm, linear or narrowly lanceolate, 5-9 cm. long, 3-8 mm. wide, acute, sharply and remotely dentate to entire, 1-nerved, essentially glabrous, impressed-punctate beneath, sessile; inflorescence 5-10 cm. broad, flattened, bearing relatively few 21 -flowered heads; involucre broadly campanulate, 8 mm. broad, 7-9 mm. high, purple; scales appressed, regularly imbricate in 4 or 5 series, glabrous or nearly so, acute or mucronate, the outer ovate, the inner oblong, 2-2.5 mm. wide; achenes glabrous, resinous in the furrows, 4 mm. long; pappus purple to tawny-purple, the inner bristles 7-8 mm. long, the outer series similar but shorter.
Type locality: Texas.
Distribution: Texas.

Vernonia marginata adalah spesies tumbuhan yang tergolong ke dalam famili Asteraceae. Spesies ini juga merupakan bagian dari ordo Asterales. Spesies Vernonia marginata sendiri merupakan bagian dari genus Vernonia. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh (Torr.) Raf..

Vernonia marginata là một loài thực vật có hoa trong họ Cúc. Loài này được (Torr.) Raf. miêu tả khoa học đầu tiên năm 1832.