Ord 83. BETULACEA 



1. B E T U L A, Tourn. 



1. Betula oociden talis, Hook. 



Betula occidentalis, Hook. Fl. Bor.-Amer. 2, p. 154; Nutt. Sylv. 1, p. 22, t. 7. 

 B. rhombifolia, Kutt. 1. c. t. 8.? 



Hab. Banks of rivers in all parts of Washington Territory. — 

 Varying in height from 6 to 25 feet. There are small-leaved speci- 

 mens with male aments from Nisqually, Puget Sound, which seem to 

 be Nuttall's B. rhombifolia, the only difference being that the latter is 

 described as having the leaves dotless, whereas they are minutely 

 dotted in the Nisqually plant. I have not seen the leaves so large 

 as they are described by Hooker. 



2. ALNUS, Tourn. 

 1. Alnus viridis, DC. 



Alnus viridis, Fl. Franc. 3, p. 304; Bongard Veg. Sitch. 162 ; Hook. Fl. Bor.-Am. 



2, p. 157. 

 A. Oregona, Kutt. Sylv. 1, p. 28, t. 9 ; Newberry, Bot. Williamson & Abbot's Kep. 



p. 25. 



Hab. On banks of streams and in woods, Port Discovery, Puget 

 Sound; common also in Oregon. This is certainly the A. viridis of 

 Hooker and Bongard, of which I have specimens from the Pacific 

 coast, named by those botanists. It is also the same as No. 811 of 

 Fendler's New Mexican Collection (1847). 



