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: G. L. Anderson, 1864. 



Oregon: H. M. Cronkhite. 



Montana: F. D. Kelsey, 1891. 



Idaho : Henderson, No. 3599, 1896. 



7. Drymocallis Hanseni (Greene). 



PotentiUa 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 gla,ndular than the preceding, simple below, branched above, Avith nearly erect 

 branches. Stipules lanceolate. Basal leaves with petioles 3-6 em. long, more or less 

 puberulent, pinnate with 4 or 5 pairs of leaflets, which are rounded-obovate, 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 distinc- 

 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). 



PotentiUa ciliata Howell, Fl. N. W. Am. 1: 175. 1898. Not Greene. 



PotentiUa 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 



