200 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
differs only in its more slender habit, a slightly denser pubescence, somewhat shorter 
sepals and a more contracted and few-flowered cyme, a modification perhaps due to the 
higher altitude. Intermediate forms are not rare. It is common in the higher Sierras of 
California, Nevada and Oregon. Specimens seen : 
California: W. H. Brewer, Nos. 1767, 1705 and 2715, 1863; W. G. Wright, No. 15, 
1880; Geo. Hansen, No. 296. 
Nevada: C. L. Anderson, 1864. 
Oregon: H. M. Cronkhite. 
Montana: F. D. Kelsey, 1891. 
Idaho : Henderson, No. 3599, 1896. 
7. Drymocallis Hanseni (Greene). 
Potentilla Hanseni Greene, Pittonia, 3: 20. 1896. 
Potentilla glandulosa var. Nevadensis Greene, Fl. Fran. 65. Not Wats. 
Stem 5-8 dm. high, rather slender, finely and densely villous, especially the upper 
part, less glandular than the preceding, simple below, branched above, with nearly erect 
branches. Stipules lanceolate. Basal leaves with petioles 3-6 cm. long, more or less 
puberulent, pinnate with 4 or 5 pairs of leaflets, which are rounded-oboyate, obtuse, or the 
upper ones acute, coarsely serrate, 1-4 cm. long; stem leaves smaller, 3-5-foliolate, with 
acute leaflets. Flowers in a narrow cyme, 8-12 mm. broad. Hypanthium densely hir- 
sute; bractlets linear-lanceolate, less than half the length of the ovate acute sepals. 
Petals yellow, broadly obovate or almost orbicular, a little exceeding the calyx. Stamens 
about 25. Style thickened and glandular. 
It is nearest related to D. glandulosa, from which it does not differ materially in 
size, the form of the leaves, or in the size and color of the flowers. The main distine- 
tions lie in the denser, less glutinous pubescence, the more upright branches, and the 
smaller bractlets. 
California: E. L. Greene (Calaveras Co.), 1889. 
8. Drymocallis Ashlandica (Greene). 
Potentilla ciliata Howell, Fl. N. W. Am. 1: 175. 1898. Not Greene. 
Potentilla Ashlandica Greene, Pittonia, 3: 248. 1898. 
Stems several from a creeping rootstock, 2-3 dm. high, slender, finely and densely 
villous or pilose, especially the upper portion, scarcely at all glandular, simple below, 
above branched with erect or nearly ascending branches ; stipules linear to obovate, more 
or less lacerate-toothed. Basal leaves with short petioles, more or less pilose, with 2-4 
