222 BOTANICAL GAZETTE [MARCH 
its lobes narrowly linear-subulate, 2-3 mm. long, as long as the tube: 
petals obscurely dark veined, with pale claws; the standard about 
1 cm. long, its blade suborbicular; the wings as long, obovate with 
short slender claw; the keel rather narrow, with broadly subulate 
tip: pods linear, straight, the sutures rather prominent, 20-25 mm. 
long and 2 mm. broad. 
The first collection of this species was secured by MAcBRIDE in 1909 and 
was indicated as new at that time. However, it was deemed wise to with- 
hold publication until a full series of specimens could be secured. No. 227, 
collected June 7, 1910, is taken as the type. Its range seemed to be rather 
restricted, but it was found to be quite abundant on wet grassy bottom lands 
near Falk’s Store, in Canyon County. 
Astragalus adanus, n. sp.—Root rather large, woody, with 
branched subterranean crown: stems numerous, rather slender, 
glabrate, rather coarsely and few-striate, simple, 2-4 dm. high: 
leaves numerous, narrow, with 13-25 leaflets; the basal 15-20 cm. 
long including the long almost filiform petiole; cauline leaves shorter 
and with shorter and slightly stouter petiole; leaflets thin, from 
oblong to broadly obovate, 7-14 mm. long, glabrous above, sparsely 
appressed pubescent beneath; stipules short, scarious, ovate- 
lanceolate: racemes 1-3, few—several-flowered (5—15), axillary in the 
uppermost leaves on stout peduncles 10-18 cm. long, in fruit much 
surpassing the subtending leaves; flowers probably ochroleucous: 
calyx seemingly scarious in part, with scattering black hairs near 
the base: pod 1-celled, neither suture intruded, thick cartilaginous, 
the sutures rather prominent, somewhat flattened dorsally, nar- 
rowly ovoid with short-acuminate incurved compressed apex, at 
maturity distinctly cross-ribbed, about 1 cm. long. 
This makes the fourth species in the section PEcTINATI, the others being 
A. pectinatus (Hook.) Dougl., A. Grayi Parry, and A. nudus Wats. The leaflets 
in this species, as in the others, are indistinctly jointed to the rachis, but they 
are not linear. Since A. nudus has violet blue flowers, there seems to be no 
characters left upon which to rest RypBERG’s genus Clenophyllum (one of 
his 17 Colorado segregates of Astragalus) except the mode of leaf attachment. 
The cross-wrinkling of the pods crops out in others of the segregates as well. 
The new member of this group comes from the Boise Hills, no. 260 by MAc- 
BRIDE, June 18, 1910, The name is based upon the name of the county, which 
is said to be of Indian origin. 
