San Joaquin Milkvetch

Phaca asymmetrica (Sheldon) Rydberg
Astragalus leacophyllus T. & G. Fl. N. Am. 1: 336. 1838. Not A. leucophyllus Willd. 1803.
Phaca leucophylla H. & A. Bot. Beech. Voy. 333. 1840.
Tragacantha leucophylla Kuntze, Rev. Gen. 946. 1891.
Astragalus asymmelricus Sheldon, Minn. Bot. Stud. 1: 23. 1894.
Astragalus leucopsis leucophyllus M. E. Jones, Contr. W. Bot. 8: 23. 1898.
Astragalus leucopsis asymmelricus M. EJones, Contr. W. Bot. 10: 62. 1902.
Perennial, perhaps up to 1 m. high; stem white, silky-canescent, strigose; leaves S— 12 cm. long, ascending; stipules broadly deltoid, about 5 mm. long and fully as broad; petioles 0.5-2 cm. long, as well as the rachis canescent; leaflets 19-37, linear or oblong, rather firm, whitesilky on both sides, 1-2 cm. long, 3-5 mm. wide; peduncles 5-15 cm. long; racemes about 5 cm. long, in fruit sometimes I dm. long; bracts subulate, calyx silvery-canescent, the tube cylindrocampanulate, 5-6 mm. long, the lobes subulate, 2-4 mm. long; corolla ochroleucous, 14—16 long; banner obovate, gradually tapering into the broad claw; blade of the wings oblong-lunate, obtuse, about equaling the claw in length, with a large acute basal auricle; keel-petals similar but the blades broader; fruit silky-canescent when young, becoming glabrate except the stipe, the stipe in fruit 2.5-3 cm. long, the body oval-ellipsoid, 3-4 cm. long, 1.5-2 cm. wide and thick.
Type locality: California.
Distribution: Central and southern California.