582 FABACEAE 



43. Astragalus trichopodus (Nutt.) A. Gray. Santa Barbara Locoweed. 



Fig. 2817. 



Phaca trichopoda Nutt. in Torr. & Gray, FI. N. Amer. 1 : 343. 1838. 

 Astragalus trichopodus A. Gray, Proc. Amer. Acad. 6: 218. 1864. 

 Tragacantha trichopoda, Kuntze, Rev. Gen. PI. 948. 1891. 



Perennial, the stems usually several, erect or ascending, 30-50 cm. high, herbage grayish- 

 strigose when young, becoming greener and glabrate with age. Leaves 10-15 cm. long, the rachis 

 slender; leaflets 25-33, linear-oblong, 8-18 mm. long, 3-6 mm. wide; peduncles exceeding the 

 leaves ; flowers numerous, reflexed on short pedicels ; calyx-tube campanulate, 3 mm. long, black- 

 hairy, the teeth triangular-subulate, scarcely 1 mm. long; corolla ochroleucous, 12 mm. long, 

 the banner arched upward nearly to the tip ; pod 20-25 mm. long, 7-10 mm. high, upper suture 

 convex, oval in cross-section, acutish at both ends; stipe 8-15 mm. long. 



Dry hillsides, Upper Sonoran Zone; cismontane region, southern California, Santa Barbara to Orange 

 County. Type locality: "Borders of woods near the sea," Santa Barbara, California. April-May. 



Astragalus trichopodus var. capillipes (M. E. Jones) Munz & McBurney, Bull. S. Calif Acad. 31 : 67. 

 1932. Pod more compressed than in the species; upper suture straight or somewhat concave. Santa Catalma 

 Island, California. 



44. Astragalus Cusickii A. Gray. Cusick's Locoweed. Fig. 2818. 



Astragalus Cusickii A. Gray, Proc. Amer. Acad. 13: 370. 1878. 

 Phaca Ctisickii Rydb. Bull. Torrey Club 40: 47. 1913. 



Perennial, the stems tufted, erect, 3-6 dm. high, slender, broom-like, very sparsely strigose. 

 Stipules small, subulate ; leaves 6-10 cm. long ; leaflets remote, mostly scattered, narrowly linear 

 to filiform, 3-25 mm. long, deciduous ; peduncles exceeding the leaves ; flowers loosely racemose, 

 ochroleucous; calyx-tube campanulate, 4 mm. long, the teeth triangular, scarcely 1 mm. long; 

 corolla 12-15 mm. long, the banner well exceeding the keel ; pods elliptic to obovate, about 3 cm. 

 long, narrowed at the base to a short (2-4 mm.) stipe, translucent, lined and penciled with red- 

 dish purple. 



Dry rocky ridges, Upper Sonoran Zone; northeastern Oregon and adjacent Idaho. Type locality: Union 

 County, Oregon. April-May. 



45. Astragalus curtipes A. Gray. San Luis Locoweed. Fig. 2819. 



Astragalus curtipes A. Gray, Proc. Amer. Acad. 6: 218. 1864. 



Tragacantha curtipes Kuntze, Rev. Gen. PI. 944. 1891. 



Astragalus leucopsis var. curtipes Jones, Contr. West. Bot. No. 10: 62. 1902. 



Perennial, woody at base, cinereous with minute appressed hairs, or green with age, the stems 

 stout, 3-6 dm. high. Stipules hyaline, conspicuous, connate opposite the petioles ; leaflets narrowly 

 oblong, 10-15 pairs; racemes rather short and dense; calyx-tube campanulate, 4 mm. long, the 

 teeth scarcely equaling the tube; corolla white, 8-10 mm. long, soon reflexed; pods half-oval, 

 3-4 cm. long, 2 cm. thick, sulcate on the upper suture, abruptly contracted at base to the short 

 stipe, which about equals the calyx. 



Dry hillsides, Upper Sonoran Zone; vicinity of San Luis Obispo, California. Type locality: San Luis 

 Obispo, on dry hillsides. April-June. 



46. Astragalus oophorus S. Wats. Spindle Locoweed. Fig. 2820. 



Astragalus oophorus S. Wats. Bot. King Expl. 73. 1871. 

 Phaca jucunda Jepson & Rydb. N. Amer. Fl. 24 : 339. 1929. 



Cespitose perennial, glabrous throughout, the stems decumbent at the base, 2-4 dm. high. 

 Leaves 10-15 cm. long; stipules broadly deltoid, 5-8 mm. long; leaflets 11-19, oval to obovate, 

 5-20 mm. long, usually retuse at the apex; peduncles 7-15 cm. long; racemes 3-7 cm. long; 

 calyx-tube campanulate, 5 mm. long, the lobes lanceolate-subulate, 4 mm. long ; corolla purple, 

 at least the banner, 15-18 mm. long; pod ellipsoid, more or less mottled, 4 cm. long and 2 cm. 

 wide, acutish at each end, the stipe little exceeding the calyx-tube. 



Desert ranges, Upper Sonoran Zone; Nevada and Utah south to the White and Panamint Mountains, Cali- 

 fornia, and northern Arizona. Type locality: Reese River Pass of the Shoshone Mountains, Nevada. May-June 



47. Astragalus nutans M. E. Jones. Providence Mountain Rattle-weed. 



Fig. 2821. 



Astragalus nutans M. E. Jones, Rev. N. Amer. Astrag. 108. 1923. 

 Astragalus deserticolus Jepson, Man. Fl. PI. Calif. 565. 1925. 



Slender perennial or biennial, canescent throughout with closely appressed hairs, the stems 

 several, slender, branching throughout, 1-3 dm. long. Leaves 2-5 cm. long; leaflets 7-13, nar- 

 rowly elliptic to linear, 6-12 mm. long; peduncles shorter than or exceeding the leayes ; racemes 

 loosely few-flowered ; pedicels 2-4 mm. long in fruit ; calyx 3 mm. long, the teeth triangular, 

 about 1 mm. long; corolla purple, about 1 cm. long, the banner with a white spot and purple 

 veins; pod nearly globose, 15-20 mm. long, 10-12 mm. wide, thin and papery, penciled with pur- 

 ple, rounded at base ; stipe short, 2 mm. long or less. 



Desert sands, Lower Sonoran Zone; Providence Mountains and adjacent ranges, eastern Mojave Desert, 

 California. Type locality: Providence Mountains. May. 



