Comprehensive Description
provided by North American Flora
Vernonia viminalis Gleason, Bull. N. Y. Bot Gard. 4:184. 1906.
Stems suffrutescent, terete, finely striate, cinereous or tomentose, divaricately branching
above; leaf-blades thin, ascending, narrowly oblong or elliptic-oblong, 8-14 cm. long, 1-3 cm.
wide, somewhat falcate or asymmetric, long-acuminate, entire or minutely denticulate,
attenuate at base, rugose and scabrellate above, appressed-villous with soft white hairs beneath;
petioles none or very short; cymes numerous, 2-3 dm. long, flexuous; bracteal leaves resembling
the cauline, 2-5 cm. long; heads about 29-flowered, sessile, 1.5-3 cm. apart; involucre cam-
panulate, 9-10 mm. high; scales appressed, closely imbricate in many series, acuminate and
sharply cuspidate the outer ovate-lanceolate, the inner narrowly oblong, the exposed portion
densely tomentose, especially along the margin; achenes glabrous, sharply angled, 3.5 mm.
long; pappus yellowish-white, the bristles 8 mm. long, the outer scales broad, fimbriate-ciliate,
0.5 mm. long.
Type locality: Cuba.
Distribution: Cuba.
- bibliographic citation
- Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY