Sinclairia glabra var. hypoleuca (Greenm.) B. L. Turner

Sinclairia hypoleuca (Greenm.) Rydberg, sp. nov
Liabum glabrum hypoleucum Greenm. Proc. Am. Acad. 32: 294. 1897.
A shrub, with glabrous branches; petioles 2—4 cm. long; blades rhombic-lanceolate, denticulate, acuminate at the apex, cuneate and somewhat decurrent at the base, 8-10 cm. long, 3-5 cm. wide, green above, white-tomentose beneath; inflorescence rather large, cymosepaniculate, conic; involucre about 1 cm. high and broad; bracts in 4 or 5 series, glabrous or nearly so, thin, striate, the outer ovate, acutish, the inner oblong, rounded at the apex; corolla about 1 cm. long, the lobes 2 mm. long; style-branches 2 mm. long; achenes glabrous, 2 mm. long; pappus-bristles 8 mm. long, the outer squamellae about 1 mm. long.
Type locality: Canons near Guadalajara. Mexico. Distribution: Jalisco and Morelos to Guatemala.