326 NORTH AMERICAN FLORA [Volume 24 



9. Pisophaca Hallii (A. Gray) Rydberg. 



Astragalus Hallii A. Gray, Proc. Am. Acad. 6: 224. 1864. 

 Tragacanlha Hallii Kuntze, Rev. Gen. 945. 1891. 



Astragalus gracilentus Hallii M. E. Jones, Contr. W. Bot. 8: 13. 1898. 

 Homalobus Hallii Rydb. Bull. Torrey Club 32: 667. 1905. 



A cespitose perennial, with a woody root; stems numerous, sometimes partly under ground, 

 3-5 dm. long, decumbent, fexuose, branched, striate, sparingly strigose, 3-6 dm. long; leaves 

 spreading, 5-10 cm. long, the rachis strigose; stipules lance-deltoid, 3-4 mm. long; leaflets 13-23, 

 oblong or elliptic, cuneate at the base, rounded, truncate, or retuse at the apex, glabrous 

 above, strigose beneath, 5-15 mm. long, 2-6 mm. wide; peduncles erect, 4-12 cm. long; racemes 

 3-8 cm. long; bracts subulate 2-3 mm. long, sometimes often purple-tinged, the tube 5 mm. 

 long, 2.5 mm. thick, the teeth unequal, deltoid, about 1 mm. long; corolla 12-15 mm. long, 

 purple; banner decidedly arcuate; wings slightly shorter, the blade broadly oblanceolate, 

 about equaling the claw, with a reflexed auricle; keel-petals broader and shorter, the blade 

 semi-orbicular, shorter than the claw; pod oblanceolate-ellipsoid, slightly broader above the 

 middle, terrete, short-stipitate, acute at each end, glabrous, about 2 cm. long, 5-6 mm. wide 

 and thick; seeds brown, obliquely reniform, 2 mm. long. 



Type locality: Valleys of the Rocky Mountains of Colorado. 

 Distribution: Mountains of Colorado. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 4-1. 



10. Pisophaca coriacea (Hemsl.) Rydberg. 



Astragalus coriaceus Hemsl. Biol. Centr. Am. Bot. 1: 263. 1880. 



A perennial, with a cespitose caudex; stems flexuose, angled, puberulent, 1-2 dm. high; 

 leaves ascending, 2-4 cm. long; stipules free, linear-lanceolate, about 2 mm. long; leaflets 

 13-17, thick, linear, strigillose, obtuse, 10-12 mm. long; peduncles 2-3 cm. long, erect; racemes 

 few-flowered, short; bracts subulate; calyx hirsute, the tube about 5 mm. long, the teeth 

 1-1.5 mm. long, subulate; corolla 12-15 mm. long, apparently purplish; banner obovate, 

 rather narrow; wings and keel-petals much shorter; pod coriaceous, glabrous, cylindric, some- 

 what curved, about 1.5 cm. long and 6 mm. wide, rostrate. 



Type locality: Zacatecas. 



Distribution: Known only from the type locality. 



11. Pisophaca Gertrudis (Greene) Rydberg. 



Astragalus Gertrudis Greene, Leaflets 2: 43. 1910. 



A perennial, with a woody root; stems numerous, ascending, flexuose, branched, purplish, 



2-3 dm. long, more or less strigose; leaves 4-7 cm. long, spreading; lower stipules connate, 



the upper free, deltoid-lanceolate, 3-4 mm. long; leaflets 17-23, cuneate-oblong, rounded to 



retuse at the apex, 5-10 mm. long, 2-3 mm. wide, varying from strigose on both sides to 



glabrate; peduncles about 5 cm. long; racemes short, 2-4 cm. long; bracts lanceolate, 2-3 mm. 



long; pedicels about 2 mm. long; calyx loosely pilose to glabrate, the tube 5-6 mm. long, the 



lobes 2.5-3 mm. long, subulate; corolla about 15 mm. long, purple; banner with darker veins, 



obovate; wings shorter, the blade broadly oblanceolate, longer than the claw, with a large 



auricle; keel-petals shorter, the blade broadly lunate, shorter than the claw; pod short-villous, 



oblong, rounded at the base, acute at the apex, about 2 cm. long, 5 mm. wide, 6 mm. thick, the 



upper suture nearly straight, the lower more ventricose and sulcate. 



Type locality: Toas County, New Mexico. 

 Distribution: Known only from the type locality. 



12. Pisophaca famelica (Sheldon) Rydberg. 



Astragalus fallax S. Wats. Proc. Am. Acad. 20: 362. 1885. Not A. fallax Fischer, 1853. 

 Astragalus famelicus Sheldon, Minn. Bot. Stud. 1: 23. 1894. 

 Astragalus gracillentus fallax M. E. Jones, Contr. W. Bot. 8: 14. 1898. 



A cespitose perennial, with a woody root; stems several, decumbent at least at the base, 

 striate, str.gose, 3-4 dm. high; leaves ascending, 5-7 cm. long, the rachis strigose; stipules 



