594 FABACEAE 



long, 3 mm. wide and scarcely as thick, strigose, acute at apex, attenuate at base ; septum broad, 

 extending halfway to the upper suture. 



Dry desert slopes, Sonoran Zones; Darwin Mesa, Inyo County, California. Type locality: Mill Creek Divide, 

 Darwin Mesa, California. April-May. 



83. Astragalus owyheensis A. Nels. Owyhee Locoweed. Fig. 2857. 



Astragalus owyheensis A. Nels. Bot. Gaz. 55: 375. 1913. 



Astragalus atratus var. owyheensis M. E. Jones, Rev. N. Amer. Astrag. 182. 1923. 



Perennial, the stems several from a woody crown, prostrate, 2-5 dm. long, whole plant 

 sparsely strigose. Leaflets 5-13, remote, linear, about 1 cm. long; racemes loosely flowered, ex- 

 ceeding the leaves ; calyx strigose and black-hairy, the tube 3 mm. long, the teeth subulate, 1 mm. 

 long ; corolla white, 8-10 mm. long ; pod oblong-linear, 8-10 mm. long, 3 mm. wide, 4 mm. thick, 

 strigose, mottled with purple, the lower suture sulcate. 



Sagebrush plains, Upper Sonoran Zone; eastern Oregon and adjacent Idaho in the Owyhee River region. 

 Type locality: above the "Hot Hole" of the East Bruneau, Owyhee County, Idaho. June-July. 



84. Astragalus salmonis M. E. Jones. Trout Creek Locoweed. Fig. 2858. 



Astragalus salmonis M. E. Jones, Contr. West. Bot. No. 8: 9. 1898. 

 Tium salmonis Rydb. N. Amer. Fl. 24: 396. 1929. 



Cespitose, the stems tufted from a woody crown, rarely 2-5 cm. long. Leaves 4-6 cm. long ; 

 leaflets 9-13 or more, linear, 2-8 mm. long, strigose beneath, glabrous above ; peduncles scape- 

 like, 5—15 cm. long; racemes short, usually 3-4-flowered ; calyx-tube 4 mm. long, strigose, the 

 teeth subulate, 2 mm. long; corolla greenish white tinged with purple, 10-12 mm. long; pods 

 strigose, sessile or subsessile, about 2 cm. long, 5-7 mm. thick and about as wide, reniform in 

 cross-section, shallowly and broadly sulcate on the lower suture, the septum intruding about 

 halfway. 



Dry stony ridges, Transition Zone; Blue Mountains, Oregon. Type locality: Trout Creek, Grant County, 

 Oregon. April-May. 



85. Astragalus panamintensis Sheldon. Panamint Locoweed. Fig. 2859. 



Astragalus panamintensis Sheldon, Contr. U.S. Nat. Herb. 4: 87. 1893. 

 Astragalus atratus var. panamintensis Jepson, Man. Fl. PI. Calif. 575. 1925. 

 Tium panamintense Rydb. N. Amer. Fl. 24: 396. 1929. 



Cespitose perennial, the stems distinctly woody below forming tufts, the herbaceous branches 

 with very short internodes, silky-strigose. Leaves 5-7 cm. long; leaflets remote, seldom over 9, 

 narrowly linear-lanceolate, acute, 5-8 mm. long, silky ; peduncles shorter than the leaves, mostly 

 2-3-flowered; calyx-tube scarcely 3 mm. long, silky or black-hairy, the teeth subulate, about 

 equaling the tube; corolla white, tipped with purple, 12-15 mm. long; pod 15 mm. long, 3 mm. 

 wide and 2 mm. thick, sessile, rounded at the apex, broadly sulcate on the dorsal suture, silky- 

 strigose. 



Rocky cliffs, Upper Sonoran Zone; Panamint Mountains, California. Type locality: Surprise Canyon, alti- 

 tude 1,300 meters. April-May. 



86. Astragalus eremiticus Sheldon. Eremitic Locoweed. Fig. 2860. 



Astragalus eremiticus Sheldon, Minn. Bot. Studies 1: 161. 1894. 

 Astragalus boiseanus A. Nels. Bot. Gaz. 53: 223. 1912. 



Cespitose perennial, the stems several, 3-5 dm. high, nearly or quite glabrous. Leaves 7-10 

 cm. long; leaflets 21-35, oblong to oval, 8-18 mm. long, glabrous above, sparingly strigose be- 

 neath; peduncles 5-15 cm. long; raceme 5-10 cm. long, lax; calyx sparingly black-hairy, the 

 tube 5 mm. long, the teeth scarcely 2 mm. long ; corolla white, yellowish or purple, about 15 mm. 

 long; pod glabrous, oblong, abruptly contracted at each end, 15-20 mm. long, 6 mm. wide and 

 5 mm. thick, reniform in cross-section, the septum 1 mm. wide. 



Dry plains, Arid Transition and Upper Sonoran Zones; eastern Oregon to Idaho and northern Arizona. 

 April-May. 



Astragalus malheurensis Heller, Cat. N. Amer. PI. ed. 2. 7. 1900. (A Cusickii Rydb. Bull. Torrey 

 Club 26: 541. 1899.) Essentially like A. eremiticus Sheldon, and possibly only a form of that species, the chief 

 differences being the linear leaflets which are 20-30 mm. long and 2 mm. wide. Malheur County, Oregon. 



87. Astragalus arrectus A. Gray. Palouse Locoweed. Fig. 2861. 



Astragalus arrectus A. Gray, Proc. Amer. Acad. 8: 289. 1870. 

 Astragalus palousensis Piper, Bot. Gaz. 22: 489. 1896. 

 Phaca arrecta Piper, Contr. U.S. Nat. Herb. 11: 371. 1906. 



Stems erect from a woody crown, 3-5 dm. high, glabrous or nearly so. Leaflets 15-31, linear 

 or linear-oblong, 1-2 cm. long, sparsely strigose below, glabrate above; peduncles stout, erect, 

 1-2 dm. long ; racemes loosely flowered, 6-8 cm. long ; calyx-tube campanulate, about 3 mm. long, 

 sparsely strigose, the teeth triangular-subulate, 1 mm. long ; corolla 10 mm. long, ochroleucous ; 

 stipe about equaling the calyx-tube; pod strigose, 15-20 mm. long, 3 mm. wide, 5 mm. thick, the 

 lower suture deeply and broadly sulcate, often intruding almost to the upper suture, but with- 

 out septum. 



Hillsides, Upper Sonoran and Arid Transition Zones; eastern Washington and northeastern Oregon to adja- 

 cent Idaho. Type locality: Clearwater River, Idaho. May-June. 



Astragalus arrectus var. Leib6rgii M. E. Jones, Contr. West. Bot. No. 10: 68. pi. 13. 1902. This 

 variety differs from the typical form of the species in the narrowly linear (1 mm. wide) leaves. Eastern Wash- 

 ington and Idaho. Type locality: Egbert Springs, Douglas County, Washington. 



