Palmer's Milkvetch

Phaca palmeri (A. Gray) Rydberg
Astragalus Palmeri A. Gray, Proc. Am. Acad. 7: 398. 1868.
Stem about 5 dm. high, sparingly strigose; leaves ascending, about 1 dm. long; stipules deltoid, 2-3 mm. long; leaflets 17-27, oblong, 1-2 cm. long, 4—6 mm. wide, spaiingly strigose when young, glabrate at lea?t above in age, obtus ; peduncles about 1 dm. long, striate; racemes lax, about as long; bracts lanceolate, 1-1.5 mm. long; cab's strigose, the tube 2.5 mm. long, the teeth subulate, nearly 2 mm. long; corolla bluish-purple, resembling that of P. Vaseyi; pod erect, strigose, obliquely ov?tc in outline, 1.5 cm. long, 8 mm. wide, somewhat compressed, acute and straight on the upper suture.
Type locality: Camp Grant, southern Arizona.
Distribution: Southern Arizona.

Phaca vaseyi (S. Wats.) Rydberg
Astragalus Vaseyi S. Wats. Proc. Am. Acad. 17: 370. 1882.
Annual or biennial; stem 2-4, rarely 5-6 dm. high, striate, stiigose-canescent, branched; leaves 5-10 cm. long, the rachis strigose; stipules distinct, triangular, 3 mm. long; leaflets 13-21, oblong to elliptic, 5-15 mm. long, 2-6 mm. wide, silky-strigose on both sides, often silverywhite; peduncles 6—10 cm. long, silky-strigost ; racemes including the peduncle 5-20 cm. long, many -flowered ; calyx silvery-strigose, the tube fully 3 mm. long, the lobes subulate, 2 mm. long; corolla purplish, 10-12 mm. long; banner obovate, retuse; wings shortei, the blade oblong, longer than the claw, with a large basal auricle; keel-petals rounded at the apex; legume sessile, strigose, 15-18 mm. long, 6-7 mm. wide, gibbous on the lower suture, acute and nearly straight on the upper.
Type locality: Mountain Springs. San Diego County. California. Distribution: Southern California, northwestern Sonora, and Lower California.

Phaca metana (M. EJones) Rydberg
Aslraglus metanus M. E. Jones, Proc. Calif. Acad. II. 5: 666. 1895.
Perennial; stem decumbent at the base, 3-6 dm. high, more or less canescent-strigose, striate; leaves 10-15 cm. long, ascending; stipules deltoid, 4-5 mm. long, canescent; leaflets 15-21, oblong to oval, 1-4 cm. long, 4-8 mm. wide, densely canescent-strigose when young, greener in age, mostly rounded at the apex; peduncles 1 dm. long or more: racemes elongate, about as long, many-floweied; bracts lanceolate, 3-4 cm. long, more or less black-hairy; pedicels short; calyx black-hairy, the tube 3 mm. long, the teeth subulate, nearly 2 mm. long, corolla dark-purplish-blue, 810 mm. long; banner obovate, porrect; wings somewhat shorter; the blade oblong, with a large basal auiicle; blade of the keel-petals broadly lunate, obtuse; pod obliquely ovoid, turgid, finely strigose, 1-1.5 cm. long and 8-10 cm. wide, the upper suture straight and acute.
Type locality: Hanson's Ranch. Lower California, near the border. Distribution: Southern California and northern Lower California.