Astragalus allochrous var. playanus (M. E. Jones) D. Isely

Phaca tracyi Rydberg, sp. nov
Annual, with a deep root; stems several, strigose, decumbent or ascending, branched, 1 dm. high or less; leaves 5 dm. long or less; lower stipules connate and scarious, the upper distinct, deltoid, acuminate, 4-5 mm. long; leaflets 1 1-15, oblong, hirsute-strigose on both sides, 6-10 mm. long, 2-3 mm. wide; peduncles less than 2 cm. long; racemes few-flowered, short; calyx strigose, the tube 2 mm. long, the lobes subulate, 2 mm. long; corolla apparently white, 5-6 mm. long, similar to that of P. Wootoni; legumes sessile, strigose ovoid, 1-1.5 cm. long, 12-14 mm. wide; seeds like those of P. Wootoni.
Type collected on Tovah Creek, western Texas, April 21, 1902. Tracv b° Earle 78 (herb. N. Y. Bot. Gard.).
Distribution: Western Texas and Chihuahua.