Tripterocalyx wootonii Standl.

Tripterocalyx wootonii Standley, Contr. U. S. Nat. Herb. 12:
329. 1909.
Plants ascending or decumbent, 2-5 dm. high, much branched, the branches stout, palegreen, densely pubescent with short slender viscid hairs when young, glabrate in age; petioles 1.5-5.5 cm. long; leaf -blades narrowly deltoid-oblong to oblong-ovate, oblong, broadly ovate, or rhombic-ovate, 2.5-6.5 cm. long, 0.8-3 cm. wide, rounded to broadly cuneate at the base, narrowed to an obtuse, rounded, or rarely acute apex, bright-green above, glaucous or glaucescent beneath, when young pubescent with short slender viscid hairs, glabrate in age; peduncles 3-15 cm. long; bracts linear-lanceolate, 11-18 mm. long, long-attenuate, viscidvillous with short hairs; perianth 2.5-3.2 cm. long, viscid-puberulent outside, the limb 8-10 mm. broad, white inside, pale-pink outside, the lobes emarginate; fruit 1.5-2 cm. long, usually 3-winged, rounded at both ends, the body hard and rigid, 1-3-costate between each pair of wings, sparsely
puberulent or glabrous, the wings thin, finely reticulateveined, scaberulo-ciliolate; seed narrowly oblong, 7-8 mm. long, 2 mm. in diameter, rounded at the apex, acute at the base, palebrown.
Type locality : Near Ojo Caliente, Zuni Reservation, New Mexico.
Distribution: In dry, sandy soil, northwestern New Mexico and northern Arizona; probably also in adjacent Utah and Colorado.