dcsimg

Comprehensive Description

provided by North American Flora
Vernonia expansa Gleason, Bull. N. Y. Bot. Gard 4: 186. 1906.
Stems slender, striate, puberulent, freely branching above, forming a straggling shrub 2-3 m. high; leaves numerous, rather crowded, the blades thin, divaricate, broadly ovate, 3-5 cm. long, 1.7-2.7 cm. wide, acute or subacuminate, entire, obtuse or broadly rounded at base, minutely pubescent and resinous on both sides, the veins white and conspicuous; petioles 3 mm. long; upper leaves smaller, broadly elliptic, obtuse; inflorescence of several short cymes terminating the branches and in the upper axils, bearing each 3-6 heads; bracteal leaves equaling or much shorter than the involucre; heads crowded, 11-flowered; involucre broadly campanulate, 4 mm. high; scales all appressed, closely imbricate, obtuse, the outer broadly ovate, the inner lance-oblong, thinly villous at the base to almost glabrous at the apex; achenes 2 mm. long, densely gray-pubescent; pappus brown, the bristles 4 mm. long, conspicuously flattened and twisted, the scales 0.S mm. long.
Type locality: Jamaica.
Distribution: Jamaica.
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cc-by-nc-sa-3.0
bibliographic citation
Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY
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