BOTANY. 6 ( J 
0. Acetosella, Hook. Flor. Bor.-Amer. 1 , p. 118, in part. Flowers large, pink; whole plant 
larger than 0. Acetosella, as it grows on the shores of Lake Superior. 
LIMNANTHACEiE. 
Limnantiies Douglasii, II. Br. in Bond. & Edinb. Philos. Mag. July , 1833 ; Benth. Hort. 
Trans. (2 ser.) 1, p. 409. Shores of San Pablo bay; April. 
ANACARDIACEiE. 
Rhus diversiloba, Torr. dc Gray , Flor. 1 , p. 218. R. lobata, Hook. Flor. Bor.-Amer. 1, p. 
127. Common throughout northern California; more rare in the Klamath basin. Specimens 
from Fort Reading; April, in flower, July, in fruit. Berries white ; called by the inhabitants 
of California “poison oak.” Several of our party were poisoned by it, and it also affected some 
of our mules. 
ACERACEiE. 
Acer macrophyllum, Pursli. Flor. 1 , p. 267 ; Hook. Flor. Bor.-Amer. 1 , p. 112, t. 38; Nutt. 
Sylv. 2 , p. 76, t. 67. Cascade Mountains and Willamette Valley, 0. T. 
Acer circinatum, Pursh , Flor. 1, p. 266 ; Hook. Flor. Bor.-Amer. 1 , p. 112, t. 39. Willa¬ 
mette valley, 0. T. 
Acer glabrum, Torr. Ann. Lyc. Nat. Hist. N. York , 2, p. 172. Cascade mountains, 0. T. 
Acer tripartitum, Nutt, in Torr. & Gray , Flor. 1 , p. 247. Cascade mountains, 0. T. 
HIPPOCASTANACEiE. 
.ZEsculus California, Nutt, in Torr. &Gray , Flor. 1 , p. 251, & Sylva , 2 , p. 69, t. 64. Com¬ 
mon throughout the valleys of California. In flower July 1st. 
CELASTRACEiE. 
Euonymus occidentalis, Nutt, in Torr. & Gray , Flor. 1 ,p. 258. Coast near San Francisco; 
May, in flower. Very nearly allied to E. atropurpureus; perhaps not distinct. 
RHAMNACEJ3. 
Rhamnus Purshianus, DC.; Hook. Flor. Bor.-Amer. 1, p. 123, t. 43. 
Frangula Californica, Gray , Gen. Illust. 2, p. 178, & PI. Wright. 2, p. 28. R. oleifolius, 
Hook. Flor. Bor.-Amer. 1, p. 123. R. laurifolius, Nutt.; Torr. dcGray, Flor. 1 , p. 263. Fort 
Reading ; July. Shore of Klamath lake ; August, in fruit. 
Ceanothus velutinus, Dougl. in Hook. Flor. Bor.-Amer. 1, p. 125, t. 45. Common in the 
Cascade mountains, 0. T. The pubescence of this plant is very variable, and I have been 
unable to distinguish it from C. levigatus. 
Ceanothus thyrsiflorus, Esch.; Bot. Reg. 30, t. 38 ; Torr. & Gray , Flor. 1, p. 266; Nutt. Sylv. 
2, p. 43, t. 57. Very common about San Francisco. 
Ceanothus prostratus, Benth. PI. Hartiv. No. 1683. Pine woods in northern California ; 
grows in a mat on the ground. 
Ceanothus cuneatus, Nutt.; Torr. & Gray, Flor. 1, p. 267. Near Fort Reading ; July, in 
fruit. 
Ceanothus integerrimus, Hook. & Am. Bot. Beech, p. 329 ; Benth. PI. Hartiv. No. 1684. 
Near Fort Reading ; July, in fruit and flower. 
