Part 5, 1929] FABACEAE: GALEGEAE 293 



3. Xylophacos cuspidocarpus (Sheldon) Rydb. Bull. Torrey Club 

 40: 48. 1913. 



.4 stragalus cuspidocarpus Sheldon. Minn. Bot. Stud. 1: 147. 1894. 



Astragalus thermalis Greene, Erythea 3: 76. 1895. 



Astragalus missouriensis cuspidocarpus M. E. Jones, Rev. Astrag. 213. 1923. 



A perennial, with a woody eaudex; stems 1-2 dm. long, spreading, sparingly canescent; 

 leaves 4—8 cm. long; stipules large, membranous, deltoid; leaflets 11-17, obovate to oblong, 

 8-12 mm. long, 4-8 mm. wide, rounded to retuse at the apex, strigose beneath, glabrate above; 

 peduncles 5-8 cm. long; racemes short, 7-9-flowered; calyx strigose with blackish hairs, the 

 tube nearly 4 mm. long, the teeth subulate, 2 mm. long; corolla 15-20 mm. long, ochroleucous 

 or lemon-yellow, tinged with purple, closely resembling that of A. cibarius; pod 2-2.5 cm. long, 

 8 mm. wide, coriaceous, glabrate or sparingly strigose, arcuate, obcompressed, cross-reticulate. 



Type locality: Grafton, Montana. 

 Distribution: Montana and Wyoming. 



2. Cyanei. Cespitose perennials, usually with short stems. Leaves usually densely 

 strigose-canescent on both sides. Pod leathery or rarely woody, elongate, more or less falcate, 

 strigose or rarely glabrous, gradually acute at the apex. 



4. Xylophacos Casei (A. Gray) Rydb. Bull. Torrey Club 



52: 147. 1925. 



Astragalus Casei A. Gray, Bot. Calif. 1 : 154. 1876. 

 Tragacantha Casei Kuntze, Rev. Gen. 943. 1891. 



A perennial, with a deep root and cespitose eaudex; stems erect, 2-5 dm. high, somewhat 

 flexuose, canescent-strigose ; leaves ascending, 3-10 cm. long; stipules green, deltoid, reflexed, 

 3-5 mm. long; leaflets 5-15, linear or rarely linear-oblong, 8-18 mm. long, 1-2.5 mm. wide, 

 canescent-strigose on both sides, obtuse, truncate or retuse at the apex; peduncles 5-10 cm. 

 long; raceme rather lax, 5-10 cm. long; bracts lanceolate, 2-3 mm. long, longer than the 

 pedicels; calyx more or less black-hairy, the tube 7-8 mm. long, the teeth subulate, 2 mm. long; 

 corolla purple, 15-18 mm. long; banner oblong-obovate, deeply notched, with a fanshaped 

 white spot; wings oblanceolate, slightly arcuate; keel-petals much shorter, abruptly arched, 

 obtuse at the apex; pod 3-3.5 cm. long, short-acuminate at the base, long-acuminate at the 

 apex, obcompressed, or even sulcate on the lower suture, reticulate, strigulose, somewhat 

 mottled, 3.5-4 cm. long; 5 mm. wide, 8 mm. thick. 



Type locality: High plateau, near Pyramid Lake, Nevada. 



Distribution: Western Nevada and eastern California, apparently also southeastern Wash- 

 ington. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 30, f. 105; pi. 73. 



5. Xylophacos Zionis (M. E. Jones) Rydb. Bull. Torrey Club 

 40:48. 1913. 

 Astragalus Zionis M. E. Jones, Proc. Calif. Acad. II. 5: 652. 1895. 



A perennial, with a rootstock and short eaudex; stems ascending, 1-2 dm. high, strigose- 

 canescent; leaves spreading, 1-1.5 dm. long; stipules deltoid, 3-4 mm. long, strigose; leaflets 

 11-17, ovate or rhombic-oval, 5-20 mm. long, strigose-canescent on both sides; peduncles 

 S— 10 cm. long; bracts lanceolate, 5 mm. long, longer than the pedicels; calyx black-hairy, the 

 tube 7 mm. long, the teeth subulate, about 1 mm. long; corolla 1.5 cm. long, pink-purple; 

 banner obovate, strongly bent at the middle, the sides reflexed at the middle, with a white 

 spot, purple- veined; wings linear-oblanceolate, obtuse; keel-petals shorter, strongly arcuate, 

 acute at the apex; pod lanceolate in outline, arcuate, acute at each end, 2.5-3 cm. long, 7 mm. 

 wide, somewhat obcompressed, mottled, cross-reticulate, short-pilose. 



Type locality: Springdale, Utah. 

 Distribution: Southwestern Utah. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 47, f. 168. 



