316 NORTH AMERICAN FLORA [Volume 24 



2. Batidophaca Hosackiae (Greene) Rydberg. 



Astragalus Hosackiae Greene, Bull. Calif. Acad. 1: 157. 1885. 



Astragalus humistratus Hosackiae M. E. Jones, Contr. W. Bot. 10: 58. 1902. 



A perennial, with a cespitose caudex; stems several, decumbent, branched, 2-4 dm. long, 

 terete, sparingly pilose with kinky hairs; leaves 2-4 cm. long; stipules deltoid, membranous, 

 connate around the stem, 5-8 mm. long; petioles less than 1 cm. long; leaflets 11-15, lance- 

 oblong, acute, glabrous above, pilose with loose hairs beneath, 5-12 mm. long, about 2 mm. 

 wide, crowded; peduncles 3-6 cm. long; racemes usually short and dense, 2-4 cm. long; bracts 

 lance-linear, about 5 mm. long; calyx pilose, the tube about 2 mm. long, the teeth subulate, 

 fully 2 mm. long; corolla apparently dirty-white, 8 mm. long; banner obovate, retuse, striate; 

 wings nearly as long, the blade obliquely obovate, with a large auricle; keel-petals broadly 

 lunate, obtuse; pod about 1 cm. long, arcuate, strigose, acute on the tipper suture, rounded on 

 the lower, not sulcate, thicker than wide. 



Type locality: Northern Arizona [Flagstaff]. 



Distribution: Arizona and western New Mexico. 



Illustrations: M. E. Jones, Contr. W. Bot. 10: pi. 1; Rev. Astrag. pi. 6. 



3. Batidophaca tenerrima (M. E. Jones) Rydberg, sp. now 



Astragalus humistratus tenerrimus M. E. Jones, Proc Calif. Acad. II. 5: 649. 1894. 



A perennial, with a taproot and woody cespitose caudex; stems many, prostrate, 1-3 dm. 

 long, terete, slender, strigose; leaves spreading, 2-3 cm. long; stipules lanceolate or deltoid, 

 acuminate, green, only the lowest scarious; leaflets 11-15, mostly 2-4 mm. long, elliptic or 

 oval, the upper rarely narrower, 4—6 mm. long, green but equally strigose on both sides with 

 long 2-forked hairs, the forks appressed and opposite, appearing as if the hair was attached at 

 or near the middle; peduncles slender, 2-6 cm. long; racemes 1-2 cm. long, 5-10-flowered, dense; 

 bracts lanceolate, 1-2 mm. long; pedicels about 1 mm. long; calyx purple-tinged, strigose, the 

 tube 2-2.5 mm. long, the teeth usually a little longer; corolla white, slightly purple-veined, 

 about 8 mm. long; banner broadly obovate, retuse; wings nearly as long, the blade broadly 

 lunate, with a broad auricle; keel-petals similar, broader and more incurved at the purplish 

 apex; pod strigose, compressed, lunate, 8 mm. long, 3 mm. wide. 



Type locality: Buckskin Mountains, Arizona. 

 Distribution: Buckskin Mountains, Arizona. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 6. 



4. Batidophaca stipulacea Rydberg, sp. nov. 



A perennial, with a deep root and cespitose caudex; stems many, decumbent, 2-3 dm. 

 long, canescent with two kinds of pubescence, both pubescent with long white hairs and finely 

 strigulose; leaves 3-5 cm. long, ascending; stipules large, membranous, scarious, sparingly 

 pilose, deltoid, connate around the stem, united three fourths their length, 6-10 mm. long; 

 petioles 4—5 mm. long; leaflets 13-17, oblong, acute, 6-15 mm. long, 2-3 mm. wide, white- 

 hairy on both sides with ascending hairs; peduncles 3-5 cm. long; bracts lanceolate, scarious, 

 4-5 mm. long; calyx white-hairy, the tube about 3 mm. long, the teeth subulate, fully 3 mm. 

 long; corolla ochroleucous, about S mm. long; banner obovate, striate-veined, strongly arcuate; 

 wings slightly shorter, the blades oblong-oblanceolate, with a rounded auricle; keel-petals 

 sttongly arcuate, lunate, acuminate but with a blunt tip; pod white-strigose, strongly arcuate, 

 tapering at both ends, fully 15 mm. long, stiongly sulcate on the lower suture at and below 

 the middle, acute on the upper. 



Type collected at Mangos Springs, Grant County. New Mexico, April 12, 1903, Metcalfe 60 

 (herb. N. Y. Bot. Gard.). 



Distribution: Southwestern New Mexico and Sonora. 



5. Batidophaca humivagans Rydberg, sp.nov. 



Astragalus humistratus var. A. Gray, Proc. Am. Acad. 13: 369. 1878. 



A perennial with a deep root and cespitose caudex; stems numerous, decumbent or pros- 

 trate, 2-4 dm. long, terete, branched, strigose-canescent ; leaves ascending, 3-5 cm. long; 



