292 NORTH AMERICAN FLORA [Volume 24 



Corolla 15 mm. long or less. 



Corolla ochroleucous; leaflets broadly obovate. 44. A", argenlinus. 



Corolla purplish ; leaflets narrowly obovate or oblaneeolate. 



Racemes usually more than 6-flowered. on very' short peduncles; 



bracts lanceolate, scarcely exceeding the pedicels. 45. A", lectulus. 



Racemes 2-6-flowered, shorter than the peduncles; bracts subulate, 



almost half as long as the calyx. 46. X. lagopinus. 



7. CocciNBi 

 One species. 47. A. coccineus. 



1. Iodanthi. Cespitose perennials, but with better developed stems than in the other 

 sections. Leaves sparingly hairy or glabrous, not canescent. Pod rather thin-walled, elongate, 

 falcate, strigose, often somewhat sulcate on the lower or both sutures when mature. 



1. Xylophacos iodanthus (S. Wats.) Rydb. Bull. Torrey Club 

 52: 144. 1925. 



Astragalus iodanthus S. Wats. Bot. King's Expl. 70. 1871. 

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



A perennial, with a cespitose woody caudex; stems decumbent, flexuose, 2-6 dm. long, 

 glabrate or sparingly strigose; stipules triangular, 2-4 mm. long, hyaline, reflexed; leaves 

 spreading, 4-10 cm. long; leaflets 17-21, obovate or oval, 8-12 mm. long, 4—6 mm. wide, 

 glabrous or ciliolate on the margins and ribs, obtuse, rounded, or retuse at the apex; peduncles 

 3-5 cm. long; racemes short and rather dense; bracts lanceolate, 3 mm. long, longer than the 

 pedicels; calyx sparingly strigose with black hairs, the tube about 5 mm. long, the teeth subu- 

 late, 2 mm. long; corolla light-purple or white, 12-15 mm. long; banner oblong, abruptly bent 

 at the middle, deeply notched at the apex; wings shorter, the blades obliquely oblaneeolate, 

 with a rounded basal auricle; keel-petals much shorter, broader, strongly arcuate, and rounded 

 at the apex; pod lanceolate in outline, strongly arcuate, about 3 cm. long and 8 mm. wide, 

 mottled, sparingly strigose, finely cross-reticulate, acute at each end, usually depressed, and 

 somewhat sulcate on the sutures. 



Type locality: Virginia City. Nevada. 

 Distribution: Nevada and eastern California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 45, f. 163. 



2. Xylophacos cibarius (Sheldon) Rydb. Bull. Torrey Club 

 40:48. 1913. 



Astragalus iodanthus (form) S. Wats. Bot. King's Expl. 71. 1871. 



Astragalus iodanthus M. E. Jones, Zoe 3: 294. 1893. Not A. iodanthus S. Wats. 1871. 



Astragalus cibarius Sheldon, Minn. Bot. Stud. 1: 149. 1894. 



Astragalus arietinus M. E. Jones, Proc Calif. Acad. II. 5: 653. 1895. 



Astragalus Webberi cibarius M. E. Jones, Contr. W. Bot. 10: 87. 1902. 



A perennial, with a cespitose caudex; stems 1.5-3 dm. long, decumbent and spreading, 

 striate, sparingly strigose; leaves 6-9 cm. long; stipules large, ovate or deltoid, ciliate, erect; 

 leaflets 11-17, obovate-oblong to orbicular, obtuse to retuse, glabrate above, strigose beneath, 

 5-10 mm. long; peduncles 8-11 cm. long; racemes 8-12-flowered, short; bracts lanceolate, 

 scarious, 5 mm. long; calyx black-hairy, the tube 5 mm. long, the teeth subulate, 2 mm. long; 

 corolla ochroleucous and purple, about 15 mm. long; banner obovate, strongly bent at the 

 middle, slightly retuse; wings slightly shorter, the blades oblanceolate-oblong, with a large 

 rounded auricle; keel-petals broadly lunate, rounded at the apex; pod lanceolate in outline, 

 acute at each end, 2.5-4 cm. long, about 1 cm. wide, sparingly strigose or glabrate in age, cross- 

 reticulate, arcuate, obcompressed and often sulcate on the lower suture. 



Tyte locality: Utah Valley, Utah. 

 Distribution: Montana to Utah and Colorado. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 45, f. 162. 



