248 
teeth, a more slender stem which is inclined to be tinged with red, 
and a fruiting calyx scarcely larger than that of the next species. 
According to Prof. Greene, it is common in dry open pine woods 
of the foot hills of the Sierra Nevada. I have seen specimens 
from only two collections, viz., Coville & Funston, no. 1355, from 
Big Tree Cafion, Southern California, 1891; and Mrs. R. M. 
Austin, Modoc Co., Calif., 1895. 
POTENTILLA RHOMBOIDEA N. sp. 
P. glandulosa var. Nevadensis Wats. Bot. Calif. x: 178, in part. 
1876. Not P. Nevadensis Boiss. | 
Stem low and slender, about 2 dm. high, simple, about 3- 
leaved, not striate, nearly glabrous or glandular above, with very 
short hairs. Stipules small, 2-4 mm., ovate and subentire. Basal 
leaves many, short-petioled, about 3-paired, smooth or beset with 
a few scattered hairs. Leaflets rhombic-ovate, mostly acute, sef- 
rate with acute teeth, the largest ones 114 cm., seldom 2 cm. long. 
Stem leaves about 3, similar, the lowest pinnate with about 2 pairs, 
short-petioled, the other two generally 3-foliolate and subsessile. 
Flowers few in open cymes, about 1 cm. in diameter. Calyx gland- 
ular with very short hairs, sometimes also with a few long hairs; 
sepals about 8 mm. long in fruit. Bractlets linear-oblong, obtuse 
or acutish, half the length of the broadly ovate slightly mucronate 
sepals. Petals yellow, obovate, a little exceeding the sepals. 
Stamens 15-20. Style nearly basal, filiform, long and slender, 10 — 
fruit about twice as long as the smooth achene. 
It somewhat resembles depauperate P. g/andulosa, but differs 
by its longer filiform style, which is not fusiform, by the pubes- 
cence which could be called glandular-pruinose, when present, with 
a few scattered straight hairs on the calyx and the leaves, and by 
the small fruiting calyx. It reminds us also of P. drevifolia, but in 
the latter the style is not basal and the petals emarginate. : 
P. rhomboidea is apparently a rare plant. The following spec!- 
mens have been seen by me: 
Nevada, S. Watson; Montana, S. Watson, no. 114; Washing- 
ton, W. V. Suksdorf (Mt. Paddo), 1885; Oregon, Thomas 
Howell (Deer Creek Mts.), no. 1128, 1887. 
To this group belong also P. geoides Bieb. of Tauria, P. 7pés- 
tris L. of Europe and northern Asia, and P. macrocalyx Huet du 
Pav. of the Pyrenees, : 
