378 NORTH AMERICAN FLORA [Volume 24 



wings a little shorter, the blade oblong; fruit minutely black-strigulose, the stipe about 1 mm. 

 long, the body ellipsoid, abruptly contracted at each end, about 15 mm. long, 7 mm. wide. 



Type locality: Salazar, Sierra de las Cruces [State of Mexico?]. 

 Distribution: Known only from the type locality. 



34. Atelophragma oaxacanum (Rose) Rydb. Bull. Torrey Club 

 55: 160. 1928. 



Astragalus guatemalensis oaxacanus M. E. Jones, Rev. Astrag. 189. 1923. 

 Astragalus oaxacanus Rose; M. E. Jones, Rev. Astrag. 189, as synonym. 1923. 



A perennial; stems 5 dm. tall or more, sparingly strigose, striate; leaves spreading, about 

 1 dm. long, the rachis sparingly strigose; stipules lance-deltoid, 3-4 mm. long; leaflets 21-27, 

 elliptic, rounded, truncate or retuse at the apex, 8-15 mm. long, 3-16 mm. wide, glabrous 

 above, sparingly pilose beneath with ascending hairs; peduncles 10-15 cm. long; racemes 3-5 

 mm. long; bracts lanceolate, 3 mm. long, black-hairy; pedicels very short; calyx black-hairy, 

 the tube 3 mm. long,«nearly as broad, the teeth subulate, 2.5 mm. long; corolla cream-colored, 

 1 1-12 mm. long; banner obovate, moderately arched; wings nearly as long, the blade obliquely 

 oblanceolate, slightly falcate, with a reflexed auricle; keel-petals shorter, the blade broadly 

 obliquely obovate, rounded at the apex; pod minutely strigulose with black hairs, the stipe 

 equaling the calyx-tube, the body oblong, 18-20 mm. long, 6 mm. broad, the septum fully 1 mm. 

 broad. 



Type locality: [Sierra San Felipe] Oaxaca. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 43. 



35. Atelophragma potosinum Rydb. Bull. Torrey Club 

 55: 160. 1928. 



Astragalus strigulosus gracilis Hemsl. Biol. Centr. Am. Bot. 1: 266. 1880. 



A cespitose perennial; stems several, decumbent, 3-4 dm. high, sparingly strigulose; leaves 

 ascending, 3-7 cm. long, the rachis strigose and sulcate; stipules lance-deltoid, acuminate, 3 mm. 

 long; leaflets 15-25, elliptic or oval, 3-8 mm. long, 1.5-3 mm. wide, rounded at the apex, glab- 

 rous above, strigose beneath; peduncles 5-10 cm. long; racemes 2-3 cm. long; bracts subulate, 

 2—3 mm. long; pedicels very short; calyx rather loosely hairy, usually with mixed black and 

 white hairs, the tube 2.5 mm. long, the teeth subulate, 1.5 mm. long; corolla cream-colored, 

 about 1 cm. long ; banner obovate, moderately arched ; wings nearly as long, the blade obliquely 

 oblanceolate, falcate, with a reflexed auricle; keel-petals much shorter, the blade obliquely 

 obovate, rounded at the apex; pod strigulose, mostly with black hairs, the stipe 4 mm. long, 

 the body oblong, acute at each end, about 2 cm. long and 5 mm. wide; septum 0.5 mm. wide; 

 seeds 14-16, about 2.5 mm. long. 



Type locality': Zimapan [Hidalgo]. 

 Distribution: San Luis Potosi and Hidalgo. 

 Illustration: M. E. Jones, Rev. Astrag. pi. -42. 



36. Atelophragma altum (Wooton & Standley) Rydb. Bull. Toney 

 Club 55: 161. 1928. 



Astragalus alius Wooton & Standley, Contr. U. S. Nat. Herb. 16: 136. 1913. 



A perennial; stems several, slender, erect, sparingly strigose, branched, 4-6 dm. high; 

 leaves 8-10 cm. long, ascending; stipules deltoid-lanceolate, acuminate; leaflets 21-29, elliptic 

 to oblong, 8-10 mm. long, obtuse or acute, glabrous above, strigose beneath; peduncles 5-S cm. 

 long; racemes 2-6 cm. long; bracts lanceolate, 1-2 mm. long; pedicels 1 mm. long; calyx yellow- 

 ish, sparsely black-strigulose, 4 mm. long, the teeth deltoid, 1 mm. long; corolla ochroleucous 

 or yellow, 9-10 mm. long; banner obovate, moderately arched; wings nearly as long, the blade 

 oblanceolate, with a reflexed auricle; keel-petals much shorter, the blade broadly obovate, 

 rounded at the apex; pod black-strigulose, the stipe 6 mm. long, the body lance-oblong or ob- 



