Balloon Milk Vetch

Phaca argentata Rydberg, sp. nov
Perennial, with a deep root and short cespitose caudex; stems many, decumbent, branched, canescent, more or less purple-tinged, leaves 4—8 cm. long, ascending; stipules broadly deltoid, 4 mm. long; leaflets 1 1-25, obovate to oblong, 6-10 mm. long, 2-6 mm. wide, rounded or retuse at the apex, silvery-white, strigose; peduncles 3-7 cm. long; racemes short, 5-7-flowered; calyxtube campanulate, 4 mm. long, silvery-strigose, the lobes subulate from a bioad base, 1.5 mm. long; corolla tinged with purple, 12-14 mm. long; banner obovate, gradually tapering below; wings shorter, the blade oblong-lunate, obtuse, longer than the claw, with a prominent, recurved basal auricle; keel-petals broader, rounded at the apex; pod glabrous, beautifully mottled, the stipe 4-5 mm. long, the body obovoid, 2.5-3 cm. long, 1.5 cm. wide.
Type collected on the west slope of Star Peak, West Humboldt Mountains, Nevada. Julv 31, 1912, Heller 10633 (herb. N. Y. Bot. Gard.). Distribution: Western Nevada.

Phaca pinosa (Elmer) Rydberg, sp. now
Astragalus Whitney i pinosus Elmer, Bot. Gaz. 39: 54. 1905. Astragalus Hookerianus pinosus Jepson, Man. Fl. PI. Calif. 564. 1925.
Perennial, with a thick woody root; stems numerous, 1-2 dm. long, decumbent, glabrous or nearly so; leaves 3-5 cm. long; stipules scaiious, broadly deltoid, about 3 mm. long, the lower connate; leaflets 15-19, sparingly strigulose or glabrate, 6-10 mm. long, linear or oblong; peduncles 4-6 cm. long; racemes short, 5-10-flowered; bracts deltoid, 2-3 mm. long; calyx-tube campanulate, 3 mm. long, whiteand black-hairy, the lobes subulate, 1 mm. long; corolla ochroleucous, about 1 cm. long, similar to those of the preceeding species; pod glabrous, the stipe 2-3 mm. long, the body obovoid, 2-2.5 qm. long, 15-18 mm. wide, mottled.
Type locality': Mt. Pinos, Ventura County, California. Distribution: Known only from the type locality.

Phaca whitneyi (A. Gray) A. Heller, Muhlenbergia 9: 67. 1913
Astragalus Whitneyi A. Gray, Proc. Am. Acad. 6: 526. 1865.
Tragacantha Whitneyi Kuntze, Rev. Gen. 949. 1891.
Astragalus Hookerianus Whitneyi Jepson, Man. Fl. PI. Calif. 564. 1925.
Perennial, with a very thick woody root and short branched caudex; stems numerous, 1-2 dm. high, decumbent, branched, strigose; leaves 4-7 cm. long; stipules lanceolate or deltoid, 2-3 mm. long; leaflets 11-19, linear or linear oblong, 5-10 mm. long, 1-3 mm. wide, canescent-strigose, obtuse; peduncles 3-5 cm. long; racemes short, 5-8-flowered; bracts lanceolate, 2-3 mm. long; calyx-tube 3-4 mm. long, sometimes somewhat black-hairy, the lobes subulate, 1 ram. long; corolla pale-purple or ochroleucous, about 1 em. long; petals as in the preceding; pod glabrous, the stipe 3-4 mm. long, the body obovoid, about 2 mm. long and 1.5 cm. wide, mottled.
Tvpic locality: Mountain near Sonora Pass. California. Distribution: Mountains of central California and western Nevada.