Ord. 84. SALICACEA 



1. POPULUS, Tourn. 



1. POPULUS MONILIFERA, Alt. 



Populus monilifera, Ait. Hort. Kew. ed. 1, 3, p. 406; Michx. Sylv. 2, p. 121, t. 98, 

 fig. 1. 



Hab. Banks of the Sacramento River, California; rare. This is 

 the most widely spread of all those species of Poplar that are known 

 by the name of Cottonwood. It does not, however, extend north of 

 the Upper Sacramento, but to the south it is found nearly to the Gulf 

 of California; eastward to the Atlantic. 



2. Populus tremuloides, Michx. 



Populus tremuloides, Michx. Fl. 2, p. 143 ; Michx. f. Silv. 2, p. 125, t. 99. fig. c. 

 Newberry, Bot. Williamson & Abbott's Rep. p. 25. 



Hab. Borders of rivers, Oregon and Washington Territory; 

 frequent in the interior, but also occurs near Fort Nisqually, Puget 

 Sound. The largest trees of this Poplar seen by Dr. Pickering were 

 60 feet high and four inches in diameter. 



3. Populus angustifolia, James. 



Populus angustifolia, James in Long's Exp. Rocky Mount. 1, p. 497 ; Torr. in 

 Ann. Lye. K York, 2, p. 249 ; Nutt. Sylv. 1, p. 52, t. 16. 



Hab. Near Fort Okanagan, on the Upper Columbia, Washington 



