66 
BOTAKY. 
incurved. — Evidently a quite variable species, including not only possibly tlie 
last species and, certainly, A. ineptus, Gray, but also A. Fre?nonHi, T. & G., 
and more doubtfully A. CouUeri, Benth., {=A. Arthu-Scliottii, Gray.) The 
flowers and fruit in all are essentially identical, but the legume of the last 
species is more densely pubescent and more coriaceous. The Var. Jlori- 
hundus, Gray, is the ordinary well-developed form. Eeported from the in- 
terior of Oregon and Washington Territory, and from Nevada, (Anderson.) 
Frequent in Western Nevada ; 5-8,000 feet altitude ; May-June. (254.) 
Var. Feemontil {A. Fremontii, T. & G., Gray's Rev., 1. 194.) More 
or less hoary with appressed hairs ; stems often somewhat flexuous ; stipules 
very small ; flowers smaller and in rather loose spikes, ochroleucous or tipped 
with purple ; legume usually smaller and somewhat hirsute. — In the imma- 
ture pod the septum is often incomplete ; a low starved form, confined to the 
valleys. Collected by Fremont in Northern Arizona, and by Cooper at Fort 
Mohave. Frequent in Nevada from the valley of the Truckee to Reese 
River. A. CouUeri, Benth., an older species from. Southern California and 
Arizona, may be a still more hoary-pubescent form, with a rather small and 
more chartaceous legume. (255.) 
Astragalus platytropis. Gray. Proc. Amer. Acad., 6. 526. Dwarf 
(2-3' high) and alpine, scarcely caulescent, rhizomas elongated and much 
branched, silvery-sericeous; stipules ovate, acuminate; leaflets 3-6 pairs, 
3-4" long, obovate ; peduncles scapelike, equaling the leaves, capitately 
few-flowered; calyx-teeth subulate, a little shorter than the campanulate 
tube; corolla 3" long, ochroleucous, with the broad rounded keel tipped 
with purple and equaling the other petals ; legume as in the preceding, 
globose-ovate, in length. — Above Sonora Pass in the Sierra Nevadas, 
(Brewer.) East Humboldt Mountains, Nevada; 11,000 feet altitude; July, 
August. (256.) 
Astragalus calycosus, Torr. MSS. Perennial, with a short thick 
much-branched caudex, nearly acaulescent, silvery-sericeous; leaflets 1-3 
(rarely 5) pairs, oblong or ovate, 1-4" long, usually acute ; peduncles radical, 
a little exceeding the leaves, 1-2' long, 2-6-flowered ; flowers ¥ long, 
ochroleucous, with the very obtuse rounded keel purple-tipped and much 
shorter than the vexillum and the 2-lobed wings ; the campanulate calyx- 
tube exceeding the acuminate or triangular teeth ; legume sessile, minutely 
