BOTANY. 69 



0. Acetosella, Hook. Flor. Bor.-Amer. I, p. 118, in part. Flowers large, pink; whole plant 

 larger than 0. Acetosella, as it grows on the shores of Lake Superior. 



LIMNANTHACE.E. 



LIMNANTHES DouGLASii, R. Br. in Lond. & Edinb. Pliilos. Mag. July, 1833 ; Benth. Hort. 

 Trans. (2 ser.) 1, j. 409. Shores of San Pablo bay; April. 



ANACARDIACE.ZE. 



RHUS DIVERSILOBA, Torr. & Gray, Flor. I, 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 &quot;poison oak.&quot; Several of our party were poisoned by it, and it also affected some 

 of our mules. 



ACERACE.E. 



ACER MACROPHYLLUM,, Pursh. Flor. I, p. 267 ; Hook. Flor. Bor.-Amer. I, p. 112, t. 38; Nutt. 

 Sylv. 2, p. 76, t. 67. Cascade Mountains and Willamette Valley, 0. T. 



ACER CIROINATUM, Pursh, Flor. 1, p. 266 ; Hook. Flor. Bor.-Amer. I, p. 112, t. 39. Willa 

 mette valley, 0. T. 



ACER GLABRUM, Torr. Ann. Lye. 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. 



HIPPOCASTANACE^K. 



-ZEscuLUS CALIFORNICA, Nutt. in Torr. &Gray, Flor. I, p. 251, &Sylva, 2, p. 69, t. 64. Com 

 mon throughout the valleys of California. In flower July 1st. 



CELASTRACEJL. 



EUONYMUS OCCIDENTALIS, Nutt. in Torr. & Gray, Flor. I, p. 258. Coast near San Francisco; 

 May, in flower. Very nearly allied to E. atropurpureus ; perhaps not distinct. 



RHAMNACEJG. 



RHAMNUS PURSHIANUS, DC.; Hook. Flor. Bor.-Amer. 1, p. 123, t. 43. 



FRANGULA CALIFORNICA, Gray, Gen. Illust. 2, p. 178, & PL Wright. 2, p. 28. R. oleifolius, 

 Hook. Flor. Bor.-Amer. 1, p. 123. R. laurifolius, Nutt.; Torr. &Gray, Flor. I, 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 THTRSIFLORUS, Esch.; Bot. Reg. 30, t. 38 ; Torr. & Gray, Flor. 1, p. 266; Nutt. Sylv. 

 c i,p. 43, t. 57. Very common about San Francisco. 



CEANOTHUS PROSTRATUS, Benth. PI. Hartw. 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. & Arn. Bot. Beech, p. 329 ; Benth. PL Hartw. No. 1684. 

 Near Fort Reading ; July, in fruit and flower. 



