Bisulcati. 244 
rarely decumbent at base, 2-3 ft. high, perennial from 
woody roots. Odor snake-like. Pubescence attached 
by base, echinate, very short, abruptly appressed. 
KEY. 
A. Pods on a stipe at least as long as calyx and pendent. Calyx 
tube about 3-4 mm. long, little inflated, both sides about straight. 
Flowers not stubby. Leaflets not linear. 
Pods oblong or oval. Flowers white, in long and loose spikes. 
s 205 Haydenianus. 
Podslinear. Flowers normally purple, in short and dense spikes. 
206 bisulcatus. 
2A. Pods short-stipitate and wholly inclosed within a large and 
bladdery calyx. Leaflets linear. Flowers stubby the blades not 
longer than calyx tube. 
Calyx shaggy and inflated. 207 oocalycis. 
205. Astragalus Haydenianus Gray in Brandegee's Rep. 235. 
(1876). Pods mostly oval, rarely oblong, rugulosely cross-nerved, 
often papery, 7-9 mm. long by nearly 4 mm. wide, very variable in 
texture, rounded at.both ends, obtuse, minutely\nigrescent but seem- 
ingly smooth, 6-7-ovuled, 2-4-seeded, with ventral grooves broad and 
ventral face widely and deeply impressed, the suture being rib-like 
and very prominent and often convex. Stipe not longer than the 
calyx. Fiowers white, about 7-9 mm. long. Wings appearing as if 
shorter than the purple-tipped keel. Mature banner reflexed till the 
tip nearly touches the calyx, about 9 mm. long. Calyx white and 
thin, the teeth much shorter than the tube. Spikes in fruit linear and 
often 3 dm. long and fully twice as long as peduncle but the 
peduncles sometimes a foot long. Stems slender and weakly ascend- 
ing, many. Pubescence of barely flattened hairs. Occasional from. 
Palisade, Nevada, to along the Virgin river, Utah, above St. George 
and along the north side of the Grand Canon and throughout the 
Navajo Basin, also in southern Wyoming, and along the Rio Grande 
in New Mexico. Lower Temperate life zone, in rather alkaline 
places on bottoms, nearly wholly on the Pacific slope. 
Forms of this species which have been described as species or 
varieties but which do not deserve even varietal rank are as follows: 
A. Haydenianus var. Nevadensis Jones, which is A. demissus Greene 
and A. Jepsoni Greene, has the pods not evidently rugulose, about 
5-seeded, papery, barely acute at each end, elliptical, 9 mm. long, 
5 mm. wide, or smaller. Proper peduncles barely as long as the 
leaves. Spikes very long and slender, often 2 dm. long. Leaflets 
8-10 pairs, thin, obovate to ovate-oblong, very obtuse or retuse. 
Bracts broadly lanceolate, barely acute. In the forms described 
by Greene cited above from the same locality the leaflets are linear- ~ 
oblong and 2 cm. long. 
rado. Var. major Jones. This is a stoute 
sulcatus. Pöds spreading, seldom pendent, 
- long, narrow, Banner ascending. Claws of wings exserted. 
