Ironweed

Vernonia concinna Gleason, Bull. N. Y. Bot. Gard 4:225. 1906. Stems erect, simple, S dm. high, glabrous; leaves numerous, the blades thin, spreading, oblong-linear or narrowly oblanceolate, flat, acute, entire or minutely denticulate, narrowed to a sessile base, bright-green and glabrous or minutely pubescent above, paler beneath and sparsely pubescent with short white hairs, 10-12 cm. long, 8-12 mm. wide; inflorescence loose, subumbellate, flattened, 1 dm. broad; heads 13-flowered; involucre campanulate-turbinate, 6-7 mm. high; scales loosely imbricate in few series, purple, at least at the margin, glabrous or nearly so on the back, thinly ciliate, the outer sharply acute, the inner subacute and mucronate to sharply acute, resinous; achenes minutely pubescent on the ribs, resinous in the furrows, 3 mm. long; pappus purple, the bristles 5-6 mm., the scales 0.5-0.6 mm. long.
Type locality: Eustis, Lake County, Florida. Distribution: Florida.