602 FABACEAE 



teeth subulate, scarcely 2 mm. long; corolla ochroleucous, 10 mm. long, the wings 2-lobed; pod 

 strigose, sessile, oblong, straight, 15 mm. long, 4 mm. wide and 3 mm. thick, slightly sulcate 

 dorsally, chartaceous. 



Gravelly or rocky situations, Canadian to Upper Sonoran Zones; eastern slopes of the Sierra Nevada, and 

 Inyo and White Mountains, California, to southern Idaho, Wyoming, and New Mexico. Type locality: western 

 Nevada. June. 



112. Astragalus umbraticus Sheldon. Silvan Rattle-weed. Fig. 2886. 



Astragalus sylvaticus S. Wats. Proc. Amer. Acad. 23: 262. 1888. Not Willd. 

 Astragalus umbraticus Sheldon, Minn. Bot. Studies 1: 23. 1894. 

 Hamosa umbratica Rydb. Bull. Torrey Club 54: 19. 1927. 



Perennial, stems several from the small crown, erect or ascending, 4-6 dm. high, with long 

 internodes, nearly glabrous. Stipules lanceolate-subulate ; leaves 5-8 cm. long ; leaflets 17-21, 

 oblong to oval, obtuse or retuse, 6-12 mm. long, thin, glabrous or nearly so ; peduncles about 

 8 cm. long ; racemes 2-8 cm. long ; calyx-tube campanulate, 3 mm. long, black-hairy ; teeth subu- 

 late, about 2 mm. long ; corolla ochroleucous, 8 mm. long ; pod linear, curved, about 12 mm. long, 

 3 mm. wide, glabrous, narrowly and deeply sulcate dorsally. 



Open woods in rich soil, Transition Zone; southwestern Oregon, south to Humboldt County, California. 

 Type locality : Glendale, Oregon. June. 



113. Astragalus bernardinus M. E. Jones. San Bernardino Rattle-weed. 



Fig. 2887. 



Astragalus bernardinus M. E. Jones, Proc. Calif. Acad. II. 5: 661. 189S. 

 Hamosa bemardina Rydb. Bull. Torrey Club 54: 19. 1927. 



Perennial, the stems several from the small crown, broom-like, pale glaucous green, sparsely 

 strigose. Leaves 7-10 mm. long ; leaflets usually 13, rather distinct, linear, 5-15 mm. long, pale green 

 and somewhat grayed with strigose pubescence ; peduncles 5-10 cm. long ; racemes 5-9 cm. long, 

 the flowers rather distant; calyx-tube 3 mm. long, canescent with appressed pubescence and in- 

 termingling black hairs ; teeth subulate, about 1 mm. long ; corolla purple, 7 mm. long ; pod linear, 

 25 mm. long, 3-4 mm. wide, erect, nearly straight, distinctly narrowed at base, glabrous, ventral 

 suture acute, the dorsal rounded, 2-celled. 



Desert ridges, Upper Sonoran Zones; desert slopes of the San Bernardino Mountains to the western base of 

 the New York Mountains, southern California. Type locality: "Morongo King Mine, east side of San Bernardino 

 Mountains, California, 5000 ft. alt." May. 



114. Astragalus tricarinatus A. Gray. Triple-ribbed Rattle-weed. Fig. 2888. 



Astragalus tricarinatus A. Gray, Proc. Amer. Acad. 12: 56. 1876. 

 Hamosa tricarinata Rydb. Bull. Torrey Club 54: 20. 1927. 



Perennial with a stout woody root, the stems several from the short caudex, 2-4 dm. high, 

 sparsely strigose. Leaves 10-15 cm. long; leaflets 17-35, oblong-oval, obtuse to retuse at apex, 

 6-15 mm. long, densely white-strigose beneath, less so above; peduncles 6-10 cm. long, sparsely 

 strigose or glabrous ; racemes 5-9 cm. long, loosely flowered ; calyx sparsely black-hairy, the 

 tube 4-5 mm. long, the teeth subulate, 2 mm. long ; corolla white, 12 mm. long, the banner broadly 

 obovate ; pod linear in outline, slightly arcuate, glabrous, 25-35 mm. long, 4-5 mm. wide and as 

 thick, broadly sulcate on the lower suture, and deeply cordate in cross-section. 



Dry desert washes, Lower Sonoran Zone; base of the San Bernardino Mountains on the desert slopes, Cali- 

 fornia. Type locality: White Water, San Bernardino County, California. April-May. 



115. Astragalus drepanolobus A. Gray. Sickle-pod Rattle-weed. Fig. 2889. 



Astragalus drepanolobus A. Gray, Proc. Amer. Acad. 19: 75. 1883. 

 Hamosa drepanoloba Rydb. Bull. Torrey Club 54: 21. 1927. 



Perennial from slender rootstocks, stems decumbent, several from the scarcely woody crown, 

 decumbent, 2-3 dm. long, sparsely strigose. Leaves 3-4 cm. long; leaflets 7-9, obovate, rounded 

 or retuse at apex, 5-8 mm. long, somewhat canescent when young, becoming green and sparsely 

 strigose when mature ; peduncles 3 cm. long, about equaled by the racemes ; flowers several to 

 many, small ; calyx-tube campanulate, oblique, scarcely over 2 mm. long, white-hairy ; teeth 

 subulate, a little shorter than the tube; corolla white, veined with purple, 6-7 mm. long; pod 

 sparsely strigose, linear, curved into a semicircle, 1 cm. long, 3 mm. wide, deeply and narrowly 

 sulcate dorsally. 



On alluvial gravelly soils, Upper Sonoran Zones; rarely collected; Bingen, Washington, John Day Valley, 

 eastern Oregon, and Washoe Valley, Nevada. Type locality: "On John Day's River at Scotts Bridge," Oregon. 

 April-May. 



116. Astragalus Congdonii S. Wats. Congdon's Rattle-weed. Fig. 2890. 



Astragalus Congdonii S. Wats. Proc. Amer. Acad. 20: 360. 1885. 

 Hamosa Congdonii Rydb. Bull. Torrey Club 54: 20. 1927. 



Perennial, the stems several, ascending or somewhat decumbent, 20-35 cm. long, plant, ex- 

 cept the inflorescence, white-woolly or the stems glabrate. Leaves 5-8 cm. long; leaflets 17-23, 

 elliptic to narrowly oblong-oblanceolate, 5-10 mm. long, obtuse to retuse; peduncles 8-10 cm. 

 long; racemes 3-8 cm. long, rather loosely flowered; calyx and rachis conspicuously black-hairy; 

 calyx-tube campanulate, scarcely 4 mm. long; teeth subulate, 2 mm. long; corolla white, about 

 15 mm. long; pods reflexed, slightly curved, linear, 15-18 mm. long, 2-3 mm. wide, acute at apex, 

 pubescent, the dorsal suture sulcate. 



On the border line between the Upper Sonoran and Transition Zones; foothills of the Sierra Nevada, Ama- 

 dor and Mariposa Counties, California. Type locality: Hites Cove, Mariposa County, California. April-May. 



