Vernonia karvinskiana DC.

Vernonia karvinskiana DC. Prodr. 5: 62. 1836
Cacalia Kanvinskiana Kuntze, Rev. Gen. 970. 1891.
Stems purple, herbaceous, erect, 1 m. high, glabrous to puberulent; leaf-blades firm,
ovate-lanceolate to oblong, 3-10 cm. long, 1.5-3 cm. wide, acuminate, entire or remotely
denticulate, acute or obtuse at base, scabrous above, puberulent beneath with short conic
hairs, very minutely pitted on both sides, nearly sessile; inflorescence depressed-hemispheric,
1 dm. wide; involucre campanulate, 8 mm. high, the scales thin, glabrous, purple, appressed
below, loose and somewhat spreading above, linear-lanceolate or narrowly oblong, tapering
regularly to the sharply acute tip or rarely rounded and mucronulate, the midvein not
prominent; achenes glabrous, glandular in the furrows, 2.5-3 mm. long; pappus almost white,
the bristles 6.5 mm. long, the scales narrowly linear, 0.8-0.9 mm. long.
Type locality: Mexico. Distribution: Oaxaca.