Part 5, 1929] FABACEAE: GALEGEAE 295 



9. Xylophacos Webberi (A. Gray) Rydb. Bull. Torrey Club 

 52: 151. 1925. 



Phaca leucophylla T. & G. Fl. N. Am. 1: 694. in part. 1840. 

 Astragalus Webberi A. Gray. Bot. Calif. 1: 154. 1876. 

 Tragacanlha Webberi Kuntze, Rev. Gen. 949. 1891. 



A perennial, with a cespitose caudex; stems 1-3 dm. high, more or less eanescent-strigose; 

 leaves 5-10 cm. long; stipules deltoid, 3-4 mm. long; leaflets 11-19, oblong, 1-2 cm. long, 

 3-6 cm. wide, obtuse or retuse at the apex, acute at the base, silvery strigose-canescent; pe- 

 duncles 4-10 cm. long; bracts lanceolate, about 3 mm. long; racemes short, 2-4 cm. long; calyx 

 strigose with mixed blackish hairs; tube 5—6 mm. long, the teeth subulate, 3 mm. long; corolla 

 ochroleucous; banner obovate, nearly 1.5 mm. long, slightly arched; wings about 12 mm. long, 

 the blade broadly oblong, shorter than the claw, with a large basal auricle; keel-petals similar, 

 but broader, more arcuate, rounded at the apex; pod lunate in outline, obtuse at the base, 

 acute at the apex, glabrous, cross- wrinkled, 3-3.5 cm. long, 4—5 mm. wide, and 1 cm. thick, 

 somewhat obcompressed. 



Type locality: Indian Valley, northeastern Sierra Nevada, California. 

 Distribution: Northeastern California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 44, f. 161. 



10. Xylophacos Shortianus (Nutt.) Rydb.; Small, Fl. SE. U. S. 

 1332. 1903. 



Astragalus Shortianus Nutt.; T. & G. Fl. N. Am. 1: 331. 1838. 



? Astragalus humilis Geyer, Lond. Jour. Bot. 6:211. 1847. 



Astragalus cyaneus A. Gray, Proc. Acad. Phila. 1863: 60. 1863. Not A. cyaneus A. Gray. 1849. 



Tragacanlha Shortiana Kuntze, Rev. Gen. 948. 1891. 



A perennial, with a cespitose caudex; stems short, usually less than 1 dm. high, rarely 

 2 dm. high, silky-canescent; leaves crowded, 5-10 cm. long; stipules deltoid, scarious, pubes- 

 cent, 5-6 mm. long; leaflets 7-17, obovate or oval, 8-20 mm. long, 4—8 mm. wide, silvery-silky 

 on both sides, rounded at the apex, often acute at the base; peduncles 4—8 cm. long, strigose; 

 racemes short and headlike; calyx silky- villous with long white hairs, the tube 8 mm. long, the 

 teeth subulate, 3-4 mm. long; corolla purple, about 18 mm. long; banner obovate, slightly 

 arcuate; wings slightly shorter, the blade about equaling the claw, oblong, slightly arcuate; 

 keel-petals similar, but the blade more arcuate, shorter, rounded at the apex; pod coriaceous, 

 cross-reticulate, strigose, arcuate, obcompressed, sulcate on the lower suture, about 4 cm. long, 

 8 mm. wide, and 12 mm. thick. 



Type locality: Rocky Mountains, towards the plains of the Oregon [probably in Wyoming]. 

 Distribution: Nebraska, Wyoming, Colorado, and New Mexico. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 45, f. 160; pi. 46: Britt. & Brown, 111. Fl./. 2139; 

 ed. 2./. 2548; Am. Jour. Bot. 15: pi. 45 E; Fl. Neb. 21: pi. 10, f. 65-69. 



11. Xylophacos pephragmenus (M. E. Jones) Rydb. Bull. Torrey 

 Club 52: 151. 1925. 



Astragalus pephragmenus M. E. Jones, Zoe 4: 267. 1893. 

 Astragalus intermedins M. E. Jones, Proc. Calif. Acad. II. 5: 656. 1895. 

 Astragalus Phoenicis M. E. Jones, Contr. W. Bot. 8: 12. 1898. 

 Xylophacos lenophyllus Rydb. Fl. Rocky Mts. ed. 2. 1126. 1922. 

 Astragalus remulcus M. E. Jones, Rev. Astrag. 209, in part. 1923. 

 Astragalus argophyllus pephragmenus M. E. Jones, Rev. Astrag. 208. 1923. 



A perennial, with a woody cespitose caudex; stems decumbent at the base, mostly less 

 than 1 dm. long, eanescent-strigose; leaves 5-10 dm. long; stipules scarious, deltoid, acuminate, 

 3-4 mm. long; leaflets 15-31, oval or obovate, loosely strigose-canescent, densely so beneath, 

 less so above, 5-10 mm. long; peduncles about 1 dm. long, overtopping the leaves; racemes 3-5 

 cm. long, 3-12-flowered; calyx white-hairy, the hairs short and loose, the tube 8 mm. long, the 

 teeth lance-deltoid, 1.5-2 mm. long; corolla purple, 15-20 mm. long, similar to that of X. 



