RHAMNACEA 263 



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2. Ceanothus cuneatus, Nutt. in Torr. & Ghxiy. 

 Hab. Mountains of Northern California; very common. 



3. Ceanothus Oregonus, Nutt. in Torr. & Gray. 



Hab. Puget Sound, and on the Columbia River; also on the 

 Umpqua Mountains in Southern Oregon. — This is an ornamental 

 shrub, sometimes 8 to 10 feet high, with long panicles of white 

 flowers. 



4. Ceanothus thyrsiflorus, Esch. 



Hab. Hillsides, San Francisco, and other parts of California, com- 

 monly not far from the sea. This very handsome species, although 

 usually forming copses, sometimes becomes almost a tree twenty feet 

 or more in height, with a trunk twelve inches in diameter. The 

 branches are reddish-brown, and angular from elevated longitudinal 

 lines or ridges. All the specimens are in fruit, which is the size of 

 a pepper-corn, and without protuberances. This is the California 

 Lilac. 



Var.? macrothyrsus : foliis ovatis acutis integerrimus supra glabrius- 

 culis subtus canescenti-iomentosis ; paniculis elongatis interrupts sub- 



' foliaceis. 



Hab. Banks of the Umpqua, Oregon.— A shrub, 6 to 8 feet high ; 

 the branches terete, often dotted with minute brown resinous papillae. 

 Leaves 1 to 2£ inches long, moderately acute, grayish-tomentose 

 underneath, the veins prominent and somewhat silky-villous ; petioles 

 3 to 5 lines long. Flowers beautiful blue, in compound umbellate 

 fascicles, which are aggregated in a paniculate manner at the 

 extremity of the branches, the lowest fascicles arising from the axils 

 of the uppermost leaves and somewhat distant from the others. This 

 variety has leaves greatly resembling those of C. Americanus, except 

 that they are quite entire, while in the inflorescence it approaches 

 C. thyrsiflorus. The specimens were without fruit. 



