238 Utah Plants. [ZOE 
whole plant is almost glabrous up to the flowers; raceme 2 to 6 
inches long; flowers scattered, spreading, reflexed in fruit; pedicels 
¥% line long, black-hairy, r line long in fruit; calyx gibbous, black 
at base and nigrescent above with short black hairs, 3 lines long, 
cylindric-campanulate, teeth minute, subulate, 4 to 5 times shorter 
than the tube; flowers red-purple, about the color of Hedysarum 
Mackenzii; banner ¥% longer than the keel ; wings I to 2 lines longer 
than the keel; pods linear-oblanceolate, reticulated, chartaceous, 
very smooth and flat, very acute at both ends, nearly straight, 1% 
to 2 lines wide, reflexed but seldom pendent, neither suture thick- 
ened ; stipe twice to thrice the length of the calyx. 
This plant differs from 4. lancearius Gray, in the stipitate and 
narrow pods, minute calyx teeth, flowers, stipules, etc. It differs 
from A. filipes Torrey, in the red-purple flowers, very short pedicels, 
calyx tube, and shorter teeth. 
This grows in the cafions of the Coal range at Castle Gate, on the — 
eastern side, on talus. Collected June 22, 1889, in fruit, and May 
II, 1890, in flower. Named for W. F. Colton, long identified 
with that region. 
ASTRAGALUS ASCLEPIADOIDES. Stems stout, single or clustered 
from a woody root, 1% to 2 feet high, erect or ascending, generally 
simple, glabrous and glaucous throughout except the minute scattered 
black hairs on the calyx; stipules very broadly-triangular, thin; 
petiole none, or only 1 line long and very flat ; leaflet one, orbicular- 
ovate, cordate, obtuse or retuse, entire, veiny, thick and almost leath- 
ery, resembling those of Asclepias cryptoceras, 2 \% by 2 inches, the 
internodes are shorter than the leaves so that the latter overlap, 
leaves scarcely reduced upwards; spikes very short (1 inch long), — 
6 to 8-flowered, arising from the axils of most of the leaves and. 
equaling or slightly surpassing them; bracts ovate, acute, a line | 
long; pedicels r to 2 lines long, stout; calyx slightly gibbous, cyl- 
indric, hyaline, white or ochroleucous, with a few black hairs, 5 lines 
long; teeth triangular, less than a line long, black-hairy; upper side _ 
of calyx cleft deeper than the lower, and the teeth also somewhat 
unequal ; corolla ochroleucous with a purple spot at tip of keel, — 
about twice as long as the calyx, wings barely exceeding the keel, 
and the banner a line or two longer; flowers erect ; pods one-celled, 
elliptical or oblong-ovate, barely acute, coriaceous, nearly round in 
cross-section, both sutures slightly thickened internally, the dorsal _ 
