378 BOTANICAL GAZETTE [NOVEMBER 
apical portion of lateral petals and blunt keel red: pods sessile, 
mottled with red or purplish blotches, horizontal or ascending, 
2cm. long, 6mm. wide, acute, straight, linear-elliptic, flattened 
dorsally and on account of the intrusion of the dorsal suture very 
broadly cordate in cross-section. 
This species is in general aspect so remarkably close to A. desperatus Jones 
that at first glance one would suppose them to be identical. Closer examina- 
tion of the floral and fruit characters, however, show them to be quite distinct. 
In A. desperatus the standard, as well as the wings and keel, is red, while in the 
new species the flowers are conspicuously bicolored. Jones has described the 
pod of A. desperatus as being “long hairy’”’; the pods of the new species are 
short pubescent. No mention is made of any markings on the pod of A. des- 
peratus; the pods of the new species are very conspicuously mottled. 
Collected on dry, rocky mesas near Naturita; alt. 5400 ft.; May 27, 1914; 
no. 360. 
Astragalus amplexus, n. sp.—Biennial or short-lived perennial: 
stems 3-4 dm. high, several from vertical root, sparsely pubescent, 
erect or spreading, more or less flexuous and often serpentine: 
leaves comparatively few, 8-12 cm. long; leaflets 17-21, oblanceo- 
late, truncate or retuse at apex, those of lower leaves opposite, of 
upper often alternate, 9-12 mm. long, 4-6 mm. broad, green, 
glabrate above, sparsely pubescent below; stipules 3-4 mm. long, 
united only at base: racemes axillary to and not surpassing the 
leaves, 7-10 cm. long: flowers 12-15, horizontal, pale violet when 
fresh; calyx tube cylindric-campanulate, 6 mm. long, nigrescent; 
lobes linear, 2-3 mm. long; banner scarcely reflexed and inclosing 
the keel and wings; wings about 14 mm. long with slender claw half 
as long as the narrow blade; keel about 2 mm. shorter than wings, 
blade about 2 mm. wide, very blunt: pods sessile, sparsely pubes- 
cent, completely 2-celled, coriaceous, 2-2.5 cm. long and 6 mm. in 
diameter, neither suture intruded and hence pod nearly circular, 
in cross-section, arcuate dorsally, mottled on dorsal surface with 
irregular purplish splotches. 
This species evidently belongs to the M1crANTHI section of WATSON’S 
revision of the genus in K1no’s Report, and to the genus Astragalus as restricted 
by Rvypserc in his segregation of the genus in Bull. Torr. Bot. Club 32:657- 
1905. Collected on dry hillsides in Long Park near Naturita, May 22, 1914; 
alt. about 6000 ft. (apparently infrequent); no. 335. 
