Florestina platyphylla (B. L. Rob. & Greenm.) B. L. Rob. & Greenm.

Florestina platyphylla Rob. & Greenm. Proc. Am. Acad. 32: 49
1896. .
Schkuhria platyphylla Rob. & Greenm. Am. Jour. Sci. III. 50: 156. 1895.
An erect stout annual; stem terete, striate, purplish, villous-pilose and more or less glandular, simple below; lower leaves opposite, the upper alternate; petioles 1-2 cm. long; blades rounded-ovate, truncate or caudate at the base, doubly crenate-dentate, triple-ribbed, densely pubescent on both sides, 4-6 cm. long, slightly paler beneath; inflorescence corymbosepaniculate, densely glandular; involucre 5 mm. high, 8 mm. broad; bracts about 5, obovate, rounded at the apex, scarious-margined, glandular-pubescent; flowers about 20; corollas 3 mm. long, purplish ; squamellae 8, ovate or suborbicular, callous at the base and with a distinct midrib.
Type locality: Monte Alban, Oaxaca. Distribution: Oaxaca.