1912] NELSON—IDAHO PLANTS 223 
Astragalus boiseanus, n. sp.—Tufted: stems several to many 
from a woody root, simple, erect, 2-4 dm. high, striate, spar- 
ingly appressed-pubescent or glabrate: leaves ascending or suberect, 
5-10 cm. long (including the short petiole); leaflets 13-25, oblong, 
obtuse or slightly emarginate, with an obscure mucro, glabrate 
above, sparsely appressed strigose beneath, 1o-15 mm. long: 
racemes short, crowded, few-flowered (5-10), on stout axillary 
peduncles which in fruit elongate to form a flat-topped corymb: 
calyx tubular, nigrescent, its short lobes subulate: pod stipitate, 
nearly straight, about 2 cm. long, abruptly acute or acuminate, 
suberect on the divaricate or ascending pedicel and stipe, the 
dorsum depressed and with a broad sulcus so intruding the suture 
as to form a two-celled pod, ventral suture prominent; stipe stout- 
ish, 1 cm. or more long, twice to thrice as long as the calyx. 
This has long been referred to A. arrectus Gray, to which indeed it is closely 
related, and the descriptions are alike ir many particulars. The plant proposed 
as new, however, may readily be distinguished by its stouter habit, its shorter 
leaves and fewer leaflets, its crowded flat-topped appearance in fruit, and more 
unerringly by the long stipes. In A. arrectus the stipe and calyx are subequal, 
and the more numerous pods in the slender fruiting raceme are more or less 
appressed to the rachis. Wholly typical of Gray’s species and nicely repre- 
senting it are C. V. Prper’s specimens as follows: Pullman, Wash., July 3, 
1903; Palouse Hills, June 30, 1897. 
The segregate seems to be the commoner form, and apparently its range 
is from southern Idaho to Utah and Arizona, but as one may readily be mis- 
taken about specimens in blossom only, I cite only fruiting specimens: C. N. 
Woops, no. 4, Caldwell, Idaho, May 1910; Francis MACBRIDE, no. 257, Boise 
hills, June 18; no. 112 (type), Big Willow, May 27, 1910. The much earlier 
date at which A. boiseanus matures indicates its distinctness from A. arrectus. 
Astragalus Booneanus, n. sp.—Acaulescent, the woody root with 
several to many crowns: leaves 6-9 cm. long, crowded on the 
crowns, hoary with a soft dense tangled (rather than appressed) 
pubescence, on petioles from one-half to nearly as long as the blade; . 
leaflets 13~21, linear-lanceolate or narrowly oblong, 1 cm. or less 
long, the lower often alternate: scapes shorter than the leaves, 
capitately few-flowered: calyx tubular; the tube about 1 cm. long, 
soon distended by the pod and at length deciduous; its teeth linear, 
3 mm. long: corolla violet or purple, the standard 20-25 mm. long, 
