422 NORTH AMERICAN FLORA [Volume 24 



9. Hamosa scaposa (A. Gray) Rydb. Bull. Torrey Club 

 32:659. 1906. 



Astragalus scaposus A. Gray, Proc. Am. Acad. 13: 366. 1878. 



Astragalus candicans Greene, Bull. Calif. Acad. 1: 156. 1885. Not A. candicans Pall. 1800. 



Astragalus calycosus scaposus M. E. Jones, Zoe 4: 26. 1893. 



A subacaulescent, densely cespitose perennial; stems numerous, very short, silvery- 

 eaneseent; leaves 3-7 cm. long; stipules deltoid, 3-5 mm. long, canescent; leaflets elliptic to 

 broadly obovate, 5-12 mm. long, 3-7 mm. wide, silvery-silky, rounded at the apex; peduncles 

 3-10 cm. long; bracts ovate, 1-2 mm. long; racemes 3-12-flowered; calyx silvery, the tube 5 

 mm. long, 2.5 mm. broad, the teeth deltoid, 1.5 mm. long; corolla purplish or white, 10-12 

 mm. long, similar to that of H. calycosa; pod oblong, strigose, acute, 15 mm. long, 3 mm. wide, 

 and 2 mm. thick, sulcate on the lower suture, cordate in cross-section. 



Type locality: Mokiah Pass, northwestern Arizona. 



Distribution: Southwestern Colorado. New Mexico, Arizona, and Nevada. 



Illustration: M. E. Jones, Rev. Astrag. pi. 65. 



10. Hamosa manca Rydb. Bull. Torrey Club 54: 17. 1927. 



An acaulescent tufted cespitose perennial, with a short woody caudex; stems less than 1 



cm. long; leaves 1.5-2 cm. long; stipules deltoid, 2 mm. long; leaflets 6-1 1, elliptic-oblanceolate, 



2-4 mm. long, 1-2 mm. wide, acute or obtusish, silvery-canescent ; peduncles slender, 2-5 cm. 



long; racemes 1- or 2- (rarely 3-) flowered; bracts lanceolate, 1 mm. long; calyx campanulate, 



silvery-strigose, the tube 3-4 mm. long, the teeth deltoid, 1 mm. long; corolla about 1 cm. 



long, ochroleucous, the keel tipped with purple; banner broadly obovate, deeply notched; 



wings of about the same length, broad, 2-lobed at the apex ; keel-petals broadly lunate, rounded 



at the apex; pod oblong-ovate, about 1 cm. long and 4 mm. wide, sericeous. 



Type locality: Clover Mountains, Nevada, near Death. 

 Distribution: Northeastern Nevada. 



4. Tricarinatae. Perennial herbs, with a woody caudex and leafy stems; leaves glabrous 

 or short-strigose ; calyx-tube short-campanulate; flowers usually middle-sized, 7-15 mm. long; 

 pod linear or nearly oblong, glabrous or strigose, more or less arcuate; somewhat compressed, 

 sulcate but not deeply so on the lower suture, cordate in cross-section. 



11. Hamosa umbratica (Sheldon) Rydb. Bull. Torrey Club 



54: 19. 1927. 



Astragalus sylvalicus S. Wats. Proc. Am. Acad. 23: 262. 1888. Not .4. sylvaticus Willd. 1803. 

 Astragalus umbraiicus Sheldon, Minn. Bot. Stud. 9: 23. 1894. 



A perennial; stems several from a short crown, 3-6 dm. high, erect, striate, glabrous, 

 straw-colored; leaves ascending, 7-12 cm. long; stipules lanceolate, acuminate, about 8 mm. 

 long ; leaflets 1 7-2 1 , oval to elliptic-oblong, usually retuse at the apex, thin, glabrous ; peduncles 

 6-10 cm. long; racemes 2-5 cm. long, rather many-flowered; bracts lance-subulate, about 3 

 mm. long; pedicels 2-3 mm. long; calyx sparingly black-hairy, the teeth lance-subulate, 2 

 mm. long; corolla white or ochroleucous, about 1 cm. long; banner obovate, abruptly arcuate, 

 notched; wings a little shorter, the blade oblong-oblanceolate, falcate, obtuse or rounded at 

 the apex; keel-petals slightly shorter, the blade strongly curved, broadly lunate, rounded at the 

 apex; pod glabrous and shining, reflexed, strongly and regularly arched, tapering at each end, 

 2 cm. long, 3 mm. wide, and 2 mm. thick, deeply sulcate on the lower suture, narrowly cordate 

 in cross-section. 



Type locality: Glendale, southern Oregon. 



Distribution: Oregon and northern California. 



Illustration: M. E. Jones, Rev. Astrag. pi. 66, f. 226. 



12. Hamosa bernardina (M. E. Jones) Rydb. Bull. Torrey Club 

 54: 19. 1927. 



Astragalus bernardinus M. E. Jones, Proc. Calif. Acad. II, 5: 661. 1895. 



A perennial, with a deep root and short caudex; stems several from the base, about 2 dm. 

 high, ascending, slender, strigose, terete; leaves spreading, arcuate, 5-8 cm. long; stipules 



