1913] NELSON & MACBRIDE—WESTERN PLANTS 375 
as the small linear-oblong bractlets: petals white, shorter than the 
lobes of the calyx, the small linear-lanceolate blade scarcely longer 
than the slender claw: stamens 5; the brown anthers subspherical, 
their cells opening lengthwise: pistils 3-5, sometimes all maturing: 
achenes large (2 mm. long), flattened, ovoid, with the inner edge 
nearly straight, noticeably longitudinally ridged on the surface. 
This plant has the foliage of some of the sections of Horkelia, the numerical 
plan of certain species of Ivesia, while the calyx characters come nearest to 
Comarella. Unfortunately this cannot get into that genus since init the petals 
are red and the pistils only two. On the whole the plant ‘here described prob- 
ably comes nearest to Horkelia Baileyi (Wats.) Rydb. The specific name chosen 
refers to the delightful fragrance emitted by the plant. 
It does not seem possible to maintain these three genera in view of the 
increasing number of species that show characteristics that overlap the generi¢ 
bounds. In fact, what character, except the open space between pistil-bearing _ 
receptacle and the margin of the hypanthial disk, separates any of them con- 
stantly from Potentilla? Agreeing in this one character and overlapping as to 
other characters, it is in the interest of simplicity to let Horkelia include 
them all 
No. 1708, Castle Ford, on the Salmon, in Idaho, is the type. It was found 
hanging in wet crevices on the vertical faces of basaltic cliffs, June 25, 112. 
POTENTILLA GLOMERATA dichroa, n. comb.—Potentilla dichroa 
Rydb. N. A. Fl. 22:319. 1908.- 
This is distinguished from the species only by the denser tomentum on the 
under side of the leaves and the grayer color of the plant as a whole. 
Astragalus owyheensis, n. sp.—Spreading, prostrate, many- 
stemmed perennial, tufted at base, minutely and sparsely strigillose, 
the slender wiry stems, including the open racemes, 2-6 dm. long: 
‘Stipules triangular, the lower about 3mm. long and scarious, 
upward becoming smaller and green: leaves 6-10 cm. long, rather 
irregularly pinnate; the leaflets (5~13) remote, shorter than the 
internodes, linear: the very open axillary racemes exceeding the 
leaves: the slender pedicels 3-6 mm. long: calyx finely strigillose 
with intermingled black hairs, the subulate teeth about one-third as 
long: flowers 8-10 mm. long, white; standard 5 mm. wide, rather 
deeply emarginate, the edges strongly recurved, forming two crests 
at the edge near the middle of the blade: wings not emarginate, 
narrowly obovate, the edges incurved: keel shorter, with a broad 
