Tripterocalyx wootonii Standl.

Stems often reddish, at least at nodes, short glandular-pubescent, viscid. Leaves: petiole 1-6.5 cm; blade ovate to elliptic-oblong, 1.5-8 × 0.5-5 cm, margins entire, often undulate, often scabro-ciliate; surfaces glabrous or glandular-puberulent, somewhat ± glaucous abaxially. Inflorescences 10-25-flowered; bracts linear-lanceolate to ovate, 5-14 × 1.5-5 mm, papery, base often ± attenuate, margins glandular short ciliate, glabrous, or glabrate. Perianth: tube pink to pinkish red, 12-25 mm, limb white adaxially, often pinkish abaxially, 8-11 mm diam., lobes showy, over 1.5 mm. Fruits oval in profile, 13-20(-25) × 9.5-17.5 mm, walls indurate; lateral ribs 1-3, or ribs absent, if exending into wings, only slightly raised; wings (2-)3(-4).

Ariz., Colo., N.Mex., Utah.

Flowering spring-fall.

Sandy soils, desert scrub; 1000-2200m.

Abronia wootonii (Standley) Tidestrom; Tripterocalyx carneus (Greene) L. A. Galloway var. wootonii (Standley) L. A. Galloway

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.