Reventi-Arrecti. 161 
117. Astragalus arrectus Gray Proc. Am, Acad. 8 289 (1870) A. 
leucophyllus Hooker, atropubescens C. and F., A. Palousensis Piper, 
A. Cusickii Rydberg not Gray, A. Malheurensis Heller, Phaca Piper. 
This is a very variable species and the type will be described first. 
Pods nearly linear, appressed, about 2 cm. long and 3 mm. wide, cor- 
iaceous, smooth, acute at both ends, the ventral suture straight or a 
little concave in the míddle but much humped at the end, raised as 
à heavy line throughout, dorsal suture variously intruded as a thin 
partition, and pod deeply sulcate. Stipe hardly as long as calyx 
and straight. Flowers white, or ochroleucous, about 1.5 cm. long. 
Banner fleshy at base and very stubby, oval, the erect part a mere 
margin about 1-2 mm. wide, about as long as keel and decidely shorter 
than the wings. Wings rather broadly oblong, notched, straight, 2-4 
mm. longer than keel, about 2 mm. wide. Keel about half a circle 3 
mm. high and long, the tip acute and a little more than erect, not 
colored. All the petals with exserted claws. Calyx campanulate and 
narrower below, rather obliquely inserted on a stout and very short 
pedicel, oblique at mouth and deeper cleft above, nigrescent (especial- 
ly on the teeth) with appressed short hairs, teeth nearly deltoid 
and nearly half as long as tube. Bracts minute, longer than the 
pedicels, triangular-ovate. Peduncles about a foot long, strict, the 
floral rachis in fruit 1-2 dm. long, almost as stout as stems. Leaves 
1-2 dm. long, the upper nearly sessile, with 6-15 pairs of nearly linear 
to broadly elliptical, retuse leaflets cuneate below, which are ashy 
helow with short and tangled hairs and rarely 2 cm. long. The young 
leaflets are mostly linear and dark, the mature leaflets are often 
ovate-elliptical and green, especially on the upper leaves which are 
the largest. Stems often a foot high and with several slender inter- 
nodes, from woody roots. This is exactly A. Palousensis Piper. It is 
common in the Columbia Basin, Middle Temperate life zone on 
prairies. A. atropubescens C, and F. nearly smooth forms with 
zigzag stems, oblong leaflets, leaves often a foot long, pedicels longer 
than the bracts and with the calyx horizontal, and a curved stipe a 
little longer than calyx bringing the erect pod within half its length 
of the rachis, the banner is produced and triangular-ovate, erect and 
2-4 mm. longer than the keel. This form abounds on the beadwaters 
of the Missoula in Deer Lodge valley and vicinity. A. Cusickii Ryd- 
berg A. Malheurensis Heller is near the var. Kelseyi but with linear 
leaflets and its long stipe. This abounds in the Snake River valley from 
Glenns Ferry west, though most of the forms are referable to the 
variety. 
Astragalus arrectus var. Leibergi Jones Cont. 7 663 (1895) as 
species, and 10 68 (1902). Phaca arrecta var. Leibergi (Jones) Piper. 
This is a form with narrowly linear to almost filiform ashy leaflets, 
scapcse peduncles a foot long and with rachis a half more, with 
tvpical pods, and with leaves nearly a foot long all clustered at the 
root which is a mass of knotty crowns. This is a striking form but 
not a good species, Egbert Spring’s Douglas Co. Wash. Leiberg. 
Astragalus arrectus var. Kelseyi (Rydberg Fl. Mont. 241 1900 as 
species) A. eremiticus var., Spencianus ‘ones A. Boiseanus Nelson. 
This has nearly straight stems a foot or two long, leaflets ovate-oblong 
to oblong, rather glaucous, about 10 pairs, stem leaves with very short 
long as body hich 23 em. long. This is the common form on the dry = 
juniper benches of Nevada from Battle Mountain to the Utah line and Se; 
