Florestina purpurea (Brandeg.) Rydb.

Florestina purpurea (Brand.) Rydberg
Hymenothrix purpurea Brand. Univ. Calif. Publ. Bot. 3: 392. 1909.
A strict annual; stem 3-5 dm. high, angled, striate, hirsutulous and more or less glandularhispid, especially above; leaves 3-5 cm. long, alternate, twice ternately dissected into linear segments, hirsutulous and sparingly glandular; heads corymbose; involucre about 5 mm. high, 8-10 mm. broad; bracts 8-10, oblanceolate, obtuse, dark-purple on the margin; flowers about 25; corollas white, tinged with purple; tube slender; lobes oblong, longer than the funnelform throat; achenes 4 mm. long, narrowly obpyramidal, 4-angled, glabrous, except the densely hirsutulous base; squamellae 8, ovate-lanceolate, the strong midrib excurrent into a short awn-point.
Type locality: Near San Louis [Tultitlanapa], Puebla. Distribution: Puebla.