Perityle jaliscana A. Gray ex S. Wats

Perityle jaliscana A. Gray, in S. Wats. Proc. Am. Acad. 22:
431. 1887.
A low perennial with a woody caudex; stem puberulent, branched at the base, 5-15 cm. high; leaves opposite; petioles 1-1.5 cm. long; blades deltoid or rhombic, 5-15 mm. long. 3-ribbed, angularly toothed, puberulent and impressed-punctate; heads corymbose; peduncles slender, 1 cm. long or less; involucre turbinate, 4-5 mm. high and fully as broad; rays none; disk-corollas whitish, glandular-puberulent, 2 mm. long, the tube about equaling the throat; achenes linear-oblong, 2 mm. long, hirsute on the faces as well as on the margins, slightly carinate on the faces ; pappus of a crown of short squamellae and two awns one half to one third as long as the achene.
Type locality: Rio Blanco, Jalisco. Distribution: Jalisco.