146 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
generally less than .5 em. long, 2-4-cleft to the base into oblong-oval segments. Cyme 
at first dense, in age open, dichotomously branched, but with nearly sessile flowers. 
Hypanthium cup-shaped or turbinate, villous, in age 4 mm. in diameter; bractlets linear- 
lanceolate, about a third shorter than the broadly lanceolate acuminate sepals. Petals 
yellow, spatulate, a little exceeding the sepals. 
The original specimens are less densely silvery than most of later collections ; those 
collected by M. K. Curran are nearly identical with the type. It is a native of the 
mountains of northern and central California. 
California: Wilkes’ Exp., No. 1572 (type); Bolander & Keller, 1872; J. G. Lem- 
mon, Nos. 60 and 70, 1874; No. 96, 1875; M. K. Curran, 1887. 
34. Horkelia unguiculata (Gray). 
Tvesia unguiculata Gray, Proc. Am. Neadad 2 3895 186s: 
Wats. King’s Rep. 5: 448; Brewer & Wats. Bot. Cal. 1: 183 (in part). 
Potentilla wnguiculata Greene, Pittonia, 1: 105. 1887. 
Greene, Fl. Fran. 1: 68 (partly). 
Potentilla ciliata Greene, Pittonia, 1: 103. 1887. 
Innusrrations: Puare 87, f. 1; dissection of flower, f. 2; stamen, f. 3; pistil, f- 
4; fruiting hypanthium and calyx, f. 5. 
Root deep and thick, crowned with ashort erect scaly rootstock. Stems several, more 
or less brown, sparingly silky-villous, simple, ascending or decumbent, 3-4 dm. high. 
Stipules pectinately divided, rather large. Basal leaves numerous, somewhat grayish but 
not densely silky with long hairs, pinnate, with numerous crowded pairs of leaflets, these 
5-.75 em. long, divided to the base into lin sar-oblong or linear acute segments. Cyme 
dense, subcapitate. Hypanthium cupulate, slightly silky, 4 mm. in diameter ; bractlets 
lanceolate, slightly shorter than the broadly lanceolate sepals. Petals white, broadly 
spatulate, exceeding the sepals. 
I can not separate Potentilla ciliata Greene, from H. wnguiculata. I have seen the 
single type specimen, collected by Dr. Kellogg, in the Owen Valley, 1873, and it does not 
differ from Gray’s and Bolander’s specimens (7. ¢., the type specimens of H. unguiculata), 
except in slightly longer leaflets and narrower sepals. P. ciliata 1s described as haying 
10 stamens; that this is not a normal condition may be seen from the fact that opposite 
some of the sepals there are two stamens as in FH. wngu iculata, while opposite most of them 
there is only one, which is generally placed a little to one side. 
H. wnguiculata is a native of the Sierra Neyada. The following specimens have 
been examined : 
