dcsimg

Comprehensive Description

provided by North American Flora
Vernonia pallescens Gleason, Bull. N. Y. Bot. Gard 4: 192. 1906.
Stems shrubby, branching above, thinly puberulent or glabrate; leaf-blades thin and membranous, elliptic, S-10 cm. long, 2.5-4.5 cm. wide, long-acuminate, sharply serrate on the upper half, less serrate or entire below, narrowed at the base into short petioles, very minutely puberulent and resinous-dotted on both sides, pale-green and glaucescent beneath ; inflorescence sparingly branched, leafless; heads about 11-flowered; involucre obconic or narrowly campanulate, 4-5 mm. high; scales few, loosely imbricate, the outer erect, narrowly lanceolate, thinly villous-pubescent, especially toward the apex, conspicuously glandular, sharply acuminate and cuspidate, the inner oblong-lanceolate, thinly short-villous, resinous-dotted, abruptly short-acuminate; achenes obscurely angled, 2 mm. long, densely strigose-pubescent; pappus rufescent, the bristles 5 mm. long, strongly barbellate, the outer series of very slender barbellate bristles, about 0.6 mm. long, not flattened.
Type locality: St. Vincent.. Distribution: St. Vincent.
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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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