380 NORTH AMERICAN FLORA [Volume 24 



40. Atelophragma straturense (M. E. Jones) Rydb. Bull. Torrey 

 Club 55: 162. 1928. 



Astragalus stralurensis M. E. Jones, Contr. W. Bot. 8: 19. 1898. 



A perennial, with a woody root; stem branched, 4-9 dm. high, striate, sparingly strigose, 

 straw-colored, flexuosc; leaves ascending, 7-10 cm. long, the rachis strigose; stipules deltoid or 

 lanceolate, acuminate, 3 mm. long, reflexed, green; leaflets 13-19, oblong or oblanceolate, 1-2 

 cm. long, 2-6 mm. wide, cuneate at the base, obtuse, truncate, or retuse at the apex, glabrous 

 above, strigose beneath; peduncles slender, 6-10 cm. long; racemes lax, 5-10 cm. long; bracts 

 lanceolate, 1-2 mm. long; pedicels 1 mm. long; calyx black-hairy, the tube acute at the base, 2.5 

 mm. long, the teeth lance-subulate, 1 mm. long; corolla purplish, about S mm. long; banner 

 obovate, rather strongly arcuate at the middle; wings slightly shorter, the blade oblanceolate, 

 falcate; keel-petals much shorter, the blade broadly obliquely obovate, rounded at the apex; 

 pod strigose, the stipe 2 mm. long, the body oblanceolate in outline, somewhat falcate, 15-20 

 mm. long, 3 mm. wide, sulcate on the lower suture; septum about 1 mm. wide. 



Type locality: Silver Reef, Utah. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 42, f. 145 [142). 



41. Atelophragma longissimum (M. E. Jones) Rydb. Bull. 

 Torrey Club 55: 162. 192S. 



Astragalus Rusbyi longissimus M. E. Jones, Proc. Calif. Acad. II. 5: 662. 1895. 



A cespitose perennial, with a woody root ; stems several, about 3 dm. high, branched, angled, 

 sparingly strigose; leaves ascending, about 1 cm. long, the rachis sulcate, sparingly hairy; stip- 

 ules lanceolate, 2-3 mm. long; leaflets 25-37, oblong-oblanceolate, 8-20 mm. long, 3-4 mm. wide, 

 light-green, glabrous above, sparingly strigose beneath, retuse or rounded at the apex ; peduncles 

 1-2 dm. long; racemes lax, about 1 dm. long; bracts lance-subulate, 2 mm. long; pedicels 2 mm. 

 long; calyx strigose often with black hairs, the tube 2 mm. long, the teeth subulate, 1 mm. long; 

 corolla straw-colored, 3-4 mm. long; banner obovate, strongly arched at the middle, even 

 slightly reflexed; wings about as long, the blade oblanceolate, falcate; keel-petals shorter, the 

 blade obliquely obovate, rounded at the apex; pod white-strigose, the stipe 5-6 mm. long, the 

 body lance-oblong, acute at each end, 1 5—1 S mm. long, 4 mm. wide, sulcate on the lower suture, 

 the septum 1.5 mm. wide; seeds 12-16. 



Type locality: Chihuahua. 

 Distribution: Chihuahua. 



42. Atelophragma Rusbyi (Greene) Rydb. Bull. Torrey Club 

 55: 162. 1928. 



Astragalus Rusbyi Greene. Bull. Calif. Acad. 1: 8. 1884. 



Astragalus slrigulosus brevidenlatus M. E. Jones, Rev. Astrag. 137. 1923. 



A perennial, with woody root; stems 3-6 dm. high, striate, nearly glabrous, often purple- 

 tinged, branched; leaves spreading, 6-10 cm. long; stipules deltoid, 3-4 mm. long; leaflets 

 13-23, oblong, elliptic or oval, 5-10 mm. long, 2-6 mm. wide, glabrous above, sparingly strigose 

 beneath, rounded or retuse at the apex; peduncles 8-10 cm. long; racemes lax, 10-15 cm. long; 

 bracts lanceolate, 2 mm. long, black-ciliate; pedicels 1 mm. long, calyx black-hairy, the tube 

 2.5 mm. long, 2 mm. broad, the teeth subulate, 1 mm. long; corolla cream-colored, 7 mm. long, 

 banner obovate, strongly arched, even slightly reflexed; wings about as long, the blade ob- 

 lanceolate, arcuate, with a reflexed auricle; keel-petals shorter, the blade broadly and obliquely 

 obovate, strongly arched near the rounded tip; pod black-hairy, the stipe 5 mm. long, the body 

 lance-oblong, about 2 cm. long, 4 mm. broad and" high, somewhat sulcate on the lower suture, 

 the septum 1 mm. wide; seeds 12-16. 



Type locality: Mount Humphreys, Arizona. 



Distribution: New Mexico and Arizona. 



Illustration: M. E. Jones, Rev. Astrag. pi. 42 (as var. brevidenlatus). 



