Oed 21 ROSACEA. 



1. PRUNUS, Linn, 

 1. Prunus (Cerasus) mollis, Dougl. 



Hab. Borders of Puget Sound; common in woods. — A small tree; 

 usually from 10 to 20 feet high; the fruit small, oval, and unpalatable. 



2. Prunus (Cerasus) emarginata, Dougl in Hook. 



Hab. Sides of the Cascade Mountains, Washington Territory. — 

 A shrub, 6 to 7 feet high, with slender branches, and leaves scarcely 

 an inch long. It is closely related to P. mollis. 



3. Prunus (Padus) Yirginiana, Linn., var. demissa. 



Hab. Puget Sound, and mountains in the interior of Washington 

 Territory. — This is the Cerasus demissa of Nuttall; but on comparing 

 numerous specimens of the western plant with P. Yirginiana of the 

 Atlantic States, I am unable to find reliable characters for distinguish- 

 ing them. 



4. Prunus (Padus) serotina, Ehrh. 



Hab. Eastern slope of the Cascade Mountains, and on the Upper 

 Columbia River. 



