PEA FAMILY 591 



77. Astragalus Howellii A. Gray. Howell's Locoweed. Fig. 285 1. 



Astragalus Howellii A. Gray, Proc. Amer. Acad. IS: 46. 1879. 

 Tium Howellii Rydb. N. Amer. Fl. 24: 389. 1929. 



Stems several from the woody root, ascending, 2-3 dm. long, strigose-pubescent. Leaflets 

 17-21, oblong-elliptical, 7-10 mm. long, cinereous with somewhat appressed woolly pubescence; 

 peduncles 10 cm. long; racemes 3-5 cm. long; calyx sparsely pubescent with whitish hairs, the 

 tube 4-5 mm. long, the teeth 3 mm. long ; corolla ochroleucous, 10 mm. long ; pods including the 

 stipe 25-30 mm. long, abruptly acute at each end, the body 4 mm. wide, strigose, cuneate-obcordate 

 in cross-section. 



Dry plains, Upper Sonoran Zone; Wasco County, eastern Oregon. Type locality: Wasco County, Oregon. 

 May-June. 



78. Astragalus misellus S. Wats. Watson's Dwarf Locoweed. Fig. 2852. 



Astragalus misellus S. Wats. Proc. Amer. Acad. 21 : 449. 1886. 



Astragalus Howellii var. misellus M. E. Jones, Rev. N. Amer. Astrag. 262. 1923. 



Tium misellum Rydb. N. Amer. Fl. 24: 389. 1929. 



Stems decumbent or ascending, 1-2 dm. long, slender, cinereous-strigose, the internodes short. 

 Leaflets 17-21, linear to linear-elliptic, 4-10 mm. long, sparsely strigose beneath, glabrate above; 

 peduncles slender, 2.5-5 cm. long; racemes 3-5 cm. long in fruit; calyx- tube 2 mm. long, strigose, 

 the teeth scarcely 1 mm. long ; corolla ochroleucous or white, 5-6 mm. long ; pod including the 

 stipe 2 cm. long, 3 mm. wide, abruptly short-acuminate at each end, strigose, almost completely 

 2-celled by the intrusion of the dorsal suture. 



Open dry hills, Upper Sonoran Zone; eastern Washington and Oregon from Pasco, Washington, to the 



John Day Valley, in Wheeler and Grant Counties, Oregon. Type locality: Mitchell, Wheeler County, Oregon. 

 lay-July. 



79. Astragalus inyoensis Sheldon. Inyo Locoweed. Fig. 2853. 



Astragalus inyoensis Sheldon, Contr. U.S. Nat. Herb. 4: 86. 1893. 

 Tium inyoense Rydb. N. Amer. Fl. 24: 389. 1929. 



Stems erect or decumbent at base from a woody cespitose caudex, 3-6 dm. high, sparingly 

 strigose. Leaves 17-21, ovate or obovate, rounded or retuse at the apex, 4-6 mm. long, glabrous 

 above, strigose beneath ; peduncles 5-10 cm. long ; racemes 2-8 cm. long ; calyx strigose, the 

 tube 3 mm. long ; corolla purple, about 10 mm. long, the keel orange with purple tip ; pod 

 strigose, tapering at both ends, only slightly inflated, 12-15 mm. long, 4-5 mm. wide, 6 mm. thick, 

 the lower suture deeply sulcate, cordate in cross-section, the septum narrow. 



Dry gravelly deserts, Lower Sonoran Zone; Inyo and White Mountains, Inyo County, California. Type 

 locality : Darwin Mesa, near Mill Creek Divide. May. 



80. Astragalus Nevinii S. Wats. Nevin's Locoweed. Fig. 2854. 



Astragalus Nevinii S. Wats. Proc. Amer. Acad. 21 : 412. 1886. 

 Tium Nevinii Rydb. N. Amer. Fl. 24: 390. 1929. 



Stems stout, decumbent, 3 dm. long, hoary. Leaflets 11-17, narrowly obovate or oblanceolate, 

 rounded or retuse at apex, 5-10 mm. long, cinereous, with an upwardly appressed pubescence; 

 peduncles 5-6 cm. long ; racemes rather lax, 3-5 cm. long ; calyx-tube broadly campanulate, 3-4 

 mm. long, black-hairy, the teeth scarcely over 1 mm. long; corolla about 10 mm. long, ochro- 

 leucous ; pod including the slender stipe 20-25 mm. long, 3 mm. wide, arcuate, acute at each end, 

 glabrous, cordate in cross-section. 



Known only from San Clemente Island, southern California. April-May. 



81. Astragalus Traskiae Eastw. Trask's Locoweed. Fig. 2855. 



Astragalus Traskiae Eastw. Proc. Calif. Acad. II. 3: 102. 1897. 



Astragalus Nevinii var. Traskiae M. E. Jones, Contr. West. Bot. No. 10: 87. 1902. 



Tium Traskiae Rydb. N. Amer. Fl. 24: 390. 1929. 



Perennial, the decumbent stems woody at the base, 2-4 dm. high, densely white-tomentose. 

 Leaves crowded, 5-9 cm. long; leaflets 17-25, elliptic to broadly oval, 5-12 mm. long, densely 

 white-tomentose on both sides ; peduncles 5-10 cm. long ; racemes 3-7 cm. long ; calyx tomentose, 

 the tube 5 mm. long, the teeth 1 mm. long; corolla yellowish, 15 mm. long; pod white-tomentose, 

 the stipe 6-7 mm. long, the body half-ovoid in outline, 15 mm. long, 4 mm. wide, 6 mm. thick, 

 abruptly acute at each end, lower suture deeply sulcate, the sulcus extending nearly halfway and 

 the septum nearly to the upper suture. 



Bluffs and mesas, in heavy soil, Upper Sonoran Zone; Islands of San Nicolas, Santa Barbara, and Anacapa, 

 southern California. Type locality : San Nicolas Island. April-May. 



82. Astragalus mensarus (M. E. Jones) Abrams. Darwin Mesa Locoweed. 



Fig. 2856. 



Astragalus atratus var. mensarus M. E. Jones, Proc. Calif. Acad. II. 5: 665. 1895. 

 Tium mensarum Rydb. N. Amer. Fl. 24 : 395. 1929. 



Cespitose perennial, with a short woody caudex, the stems several, erect or decumbent, 

 slender, 2-3 dm. long, strigose-canescent. Leaflets 11-15, elliptic or oblong, or those of the upper 

 leaves linear, 8-10 mm. long, strigose-canescent on both sides ; calyx strigose-canescent, the tube 

 4 mm. long, teeth 1-1.5 mm. long; corolla 10 mm. long, purple; pod narrowly oblong, 15 mm. 



