382 NORTH AMERICAN FLORA [Volume 24 



46 . Atelophragma Seatoni (M. E. Jones) Rydb. Bull. Torrey Club 

 55: 164. 1928. 



Astragalus Seatoni M. E. Jones. Proc. Calif. Acad. II. S: 676. 1895. 



A cespitose perennial, with a woody root ; stems several, branched, decumbent or spreading, 

 2-4 dm. long, more or less strigose; leaves spreading, 2-5 cm. long; stipules deltoid, 2 mm. 

 long; leaflets 21-25, linear, 3-10 mm. long, glabrous above, strigose beneath; peduncles 3-8 cm. 

 long; racemes dense, 2-4 cm. long; bracts lanceolate, 3-4 mm. long; pedicels 1 mm. long; calyx 

 black-hairy, the tube 1.5—2 mm. long, the teeth deltoid-subulate, 1 mm. long; corolla purple or 

 white, 5-6 mm. long; banner obovate, strongly arched; wings of about the same length, the 

 blade oblanceolate ; keel-petals slightly shorter, the blade nearly semi-orbicular; pod oblong, 

 strigulose, sessile, 6 mm. long, 2 mm. wide, blunt at each end, cordate in cross-section, the 

 septum narrow; seeds about 8, suborbicular, brown. 



Type locality: ML Orizaba, Veracruz. 

 Distribution: Veracruz, Puebla, and State of Mexico. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 70, f. 262. 



47. Atelophragma Purpusi (M. E. Jones) Rydb. Bull. Torrey Club 

 55: 164. 1928. 



Astragalus Purpusi M. E. Jones, Contr. W. Bot. 14: 34. 1912. 



A cespitose perennial; stems many, branched, prostrate, 1-2 dm. long, flexuose; leaves 

 2-3 cm. long, spreading; stipules hyaline, connate, deltoid, 3-5 mm. long; leaflets 19-23, 

 mostly obovate, often retuse, 4—5 mm. long, 1.5-2 mm. wide, glabrous above, strigose beneath; 

 peduncles 2-3 cm. long; racemes dense, about 1 cm. long; bracts lanceolate, 2 mm. long; 

 calyx black-hairy, the tube less than 2 mm. long, the teeth deltoid, less than 1 mm. long; 

 corolla purple, 4 mm. long; banner obovate, strongly arched; wings slightly shorter, the blade 

 oblong, blunt; keel-petals shorter, the blade nearly semi-orbicular; pod ovoid, 4-5 mm. long, 

 2 mm. wide, short-stipitate, the cross-section cordate. 



Type locality: Sierra de Parras, Coahuila. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 71, f. 265. 



47. PHACOMENE Rydb. Am. Jour. Bot. 16: 204. 1929. 



Cespitose perennial herbs, with ascending leafy stems. Leaves odd-pinnate, with glabrous 

 broad leaflets and large deltoid stipules. Flowers in axillary racemes. Calyx-tube deeply 

 campanulate, the teeth long and narrow. Corolla large, ochroleucous or purple. Banner 

 obovate, clawless, retuse at the apex. Wings clawed, the blade oblanceolate, slightly falcate, 

 with a reflexed auricle. Keel-petals with a winged claw and broadly lunate blade. Stamens 

 diadelphous (9 and 1), the sheath broad at the base, straight, the free portion of the filaments 

 upcurved. Ovary short-stipitate, glabrous, the style straight below, incurved near the 

 apex, the stigma small, terminal. Pod short-stipitate, membranous, inflated, acute at each 

 end, the upper suture acute, straight or somewhat concavely curved, the lower flat or slightly 

 sulcate, strongly convexly curved, the septum usually narrow and not extending to the apex. 

 Seeds many, obliquely round-reniform. 



Type species, Astragalus Beckwithii T. & G. 



Pod gradually tapering at each end. 



Pod rather thin, usually distinctly mottled; partial septum less than 1 mm. 

 wide. 

 Corolla purplish; calyx-teeth about half as long as the calyx-tube. 1. P. artemisiarum. 



Corolla ochroleucous; calyx-teeth nearly equaling the tube. 2. P. Beckwithii. 



Pod firmer and broader, usually unmottled; septum broader. 3. A. weiserensis. 



Pod abruptly contracted at least at the base. 



Body of the fruit broadly ovoid; stipe straight. 4. P. poniina. 



Body of the fruit ovoid; stipe curved. 5. P. Cimae. 



