Florestina latifolia (DC.) Rydb.

Florestina latifolia (DC.) Rydberg
Palafoxia latifolia DC. Prodr. 5: 125. 1836.
An erect stout annual; stem terete, glandular-pubescent, 5-7 dm. high, dior tri-chotomously branched; leaves opposite or the uppermost alternate; petioles 1-2 cm. long; blades broadly ovate or subcordate, 2-4 cm. long, glandular-pubescent on both sides, sinuately dentate; inflorescence corymbose-paniculate, densely glandular; involucre turbinate, 7 mm. high, 5-7 mm. broad; bracts oblanceolate or obovate, glandular-pubescent, more or less purplish; corollas purplish; tube about 1 mm. long, slender; throat funnelform, 2 mm. long, about equaling the oblong erect lobes; achenes black, 4 mm. long, sparingly hispid on the ribs; pappus of 8 scarious squamellae callous on the petiole-like base, those of the angles lanceolate, 6 mm. long with a strong midrib awn-tipped, the intermediate ones much smaller, obovate.
Type locality: Tehuantepec, Oaxaca. Distribution: Oaxaca.