Pectis stenophylla var. biaristata (Rydb.) D. J. Keil

Pectis biaristata Rydberg, sp. nov
A low diffuse annual; stem less than I dm. high, branched from the base, minutely puberulent; leaves linear, 1-2 cm. long, 1 mm. wide, minutely puberulent above or glaljrate, with 1-3 pairs of small bristles near the base; heads pedtnicled, solitary at the ends of the branches and in the upper axils; peduncles 3-4 cm. long; involucre turbinate, 4-5 mm. high and nearly as broad; bracts about 8, round-carinate below, thin and flat above, acutish; glands in two lateral rows; rayflowers 5-8; ligules elliptic, 5 mm. long, 2 mm. wide; disk-flowers 1 01 2 ; corollas about 3 mm. long; achenes 3 mm long, hirsute; pappus of 2 or 3 stout bristles, 2 mm. long, slightly dilated below.
Type collected in the vicinity of Fiierte, Sinaloa, March 26, 1910, Rose, Standley &" Russell 13537 (herb. N. Y. Bot. Gard.).
Distribution: Sinaloa.