Vernonia sinclairi

Vernonia sinclairi Benth. Bot. Voy. Sulph. 109. 1845
Vernonia Ehrenbergiana Schultz-Bip. Linnaea 20: 513. 1847. Cacalia Ehrenbergiana Kuntze, Rev. Gen. 969. 1891. Cacalia Sinclairi Kuntze, Rev. Gen. 970. 1891.
Stems herbaceous, erect, 10-25 dm. high, cinereous-pubescent or becoming glabrate in age; leaf-blades elliptic to obovate, 3-8 cm. long, 1.2-4 cm. wide, acute or short-acuminate, serrate to nearly entire, scabrous above, cinerous-pubescent or subtomentose beneath, especially along the prominent veins, on petioles 3-10 mm. long; upper leaves similar but smaller; inflorescence hemispheric or depressed-pyramidal, 1-2 dm. wide; heads 8-1 1 -flowered, on peduncles 3-6 mm. long; involucre campanulate, 4-5 mm. high; scales appressed, loosely imbricate, purple-tipped, the outer triangular-lanceolate, cuspidate, ciliate, the inner oblonglanceolate, abruptly acute or subacuminate, cuspidate, entire; achenes 2.5 mm. long, glandular in the furrows; pappus nearly white, 4-5 mm. long, the scales narrowly linear, 0.8 mm. long.
Type locality: San Bias, Tepic.
Distribution: Tepic and Michoacan to Veracruz. '