Lepidaploa argyropappa (H. Buek) Pruski

Vernonia argyropappa Buek, Index Prodr. 2: v. 1840
Vernonia Poeppigiana DC. Prodr. 5: 55. 1836. Not V. Poeppigiana DC. Prodr. 5: 20. Vernonia geminiflora Poepp.; Poepp. & Endl. Nov. Gen. & Sp. 3: 42. 1845. Cacalia argyropappa Kuntze, Rev. Gen. 969. 1891.
Stems herbaceous, at least 1 m. high, sparsely hirsute-pubescent with brown hairs; leafblades thin but firm, obovate-lanceolate to oblong-lanceolate, S— 12 cm. long, 2-3.5 cm. wide, acuminate, entire or minutely serrulate, gradually narrowed to the almost sessile base, rugose and papillate-pilose above, softly strigose-hirsute and resinous beneath; upper leaves similar but smaller; inflorescence sparingly branched, of several divaricately spreading cymes bearing each 4-10 heads; braeteal leaves oblong to oblong-lanceolate, otherwise like the cauline, the lowest 4 cm. long, l v 2 cm. wide, the upper smaller; heads 21-34-flowered, 2-3 cm. apart; involucre broadly obconic or nearly hemispheric, S-10 mm. high; scales subulate or the inner narrowly linear, erect, sparsely pilose; pappus white, the bristles 6-8 mm. long, the outer scales 1-1.2 mm. long; achenes 3 mm. long, hirsute. Type locality: Peru?.
Distribution: Veracruz to Costa Rica; southward into South America.