138 PITTONIA. 
truncate and tridentate: calyx-teeth equally silky with the 
foliage, longer than the tube: corolla dark red-purple; 
banner scarcely exceeding the other petals and quite ob- 
tuse. 
Bleak hills of southern Wyoming, about Laramie; dis- 
tributed by Mr. Buffum in 1893 as Astragalus tridactylicus, 
and by Mr. Nelson in 1894 as Trifolium dasyphyllum, but 
thoroughly distinct. It should here be remarked that in 
T. dasyphyllum the bracts subtending the outer pedicels of 
the flower-cluster are long, slender, entire and subulate- 
setaceous; very unlike those of either here described as 
new. 
HEDYSARUM MARGINATUM. ‘Tufted stems erect, 2 to 3 feet 
high, minutely appressed-pubescent, leafy throughout : leaf- 
lets in 5 to 7 pairs, oblong lanceolate and oblong, obtuse, 
mucronulate, thin, obviously pinnate-veined beneath and 
pubescent, the upper face glabrous: racemeslarge and showy, 
in fruit sometimes a foot long including the elongated pe- 
duncle: calyx-teeth shorter than the tube, broadly subulate : 
corolla rose-purple, about ł inch long: loments of from 2 to 
4 (usually 3) large obovoid joints, these commonly 4 inch 
long, in maturity exhibiting a thin scarious wing-like mar- 
gin, the surface strigulose and very irregularly reticulate. 
Mountains above Cimarron, southern Colorado, collected 
by the writer, 30 Aug., 1896; also near Pagosa Springs, Colo., 
26 July, 1899, C. F. Baker. 
THERMOPSIS PINETORUM. Stems at flowering seldom more 
than a foot high, often less, mostly simple, rather luxuri- 
antly leafy, the solitary quite sessile spike few-flowered : 
leaflets of the lowest leaves smaller than their stipules, 
obovate-oblong, emarginate, those at midway of the stem 
. ample, obovate-oblong, obtuse, 2 or 23 inches long, on petioles 
shorter than the inequilaterally cordate-ovate large stipules, 
all the foliage glabrous above, more or less hairy marginally 
and beneath: calyx somewhat villous, the triangular subu- 
