360 BOTANY. 
CeRCOCARPUS LEDIFOLIUS, Nutt.—Southern Sierras (330), /. c. p. 174. 
“Mountain Mahogany.” 
POTENTILLA GLANDULOSA, Lindl., var. NevapEnsis, Watson.—Kern 
River, at 9,850 feet altitude (376), J. c. p. 178. 
PoTENTILLA GRACILIS, Dougl., var. r1giDA, Watson.—In my specimens, 
from head of Peru Creek, the leaflets are from 13-24’ long (243); lc. p.179. 
PorenTILLA WHEELERI, Watson (Proc. Am. Acad. xi, p. 148).—South- 
ern Sierra Nevada, on Mount Olanche, at 8,200 feet altitude; J. c. p. 179.— 
Puate III, B. Plant about natural size. Fig 4. Flower, seen from above ; 
5, seen from beneath; 6, vertical section of flower;. all enlarged about 8 
diameters. Fig. 7. A single pistil. 
Horxeuia Cauiroryica, Ch. & Sch—Santa Barbara (21, 19), J. c. p.181. 
Horke.ia purpurascens, Watson (Proc. Am. Acad. xi, p. 148).—‘“Col- 
lected by Dr. J. T. Rothrock on the headwaters of Kern River, at 9,000 
feet altitude. An unmistakable Horkelia, but like HZ. tridentata, inter- 
mediate between the typical species and those of Ivesia, leaving it almost 
impossible to preserve the latter genus distinct. Specimens of H. tridentata 
have recently been found with decidedly deltoid filaments, showing that 
this character may fail even to be specific.” To the above remarks I can 
only add that in a flower of H. purpurascens I have found the distinction 
between the subulate and filiform filaments to fail, as all were between subu- 
late and deltoid, except two, which were rather deltoid, thus destroying the 
shape of the filaments entirely as a specific character. The varying num- 
ber. of carpels in both genera is another fact indicating still further the 
necessity of uniting Ivesia to this genus. I imagine that most American 
botanists will continue to keep up the distinction between this genus and 
Potentilla, whatever may become of Ivesia. I. c. p. 182—Puare III, A. 
Plant natural size. Fig. 1. Unopened flower-bud; 2, expanded flower; 3, 
petals of flower removed and calyx laid open to show the character and 
insertion of the stamens; all enlarged about 6 diameters. 
IvesIA SANTALINOIDES, Gray (Proc. Am. Acad. vi, 531, and vii, 339).— 
Mount Pitios, at 8,500 feet altitude, J. ¢. p. 183. 
Rosa Cauiroryica, Ch. & Schl—Santa Barbara, and to an elevation 
of 5,100 feet in the Coast Range (22, 228, 23), J. ¢. p. 187. 
