28 
§ I. Fruit alated. 
■ OREGON ALDER. 
ALNUS *ouegona; foliis lato-ovatis utrinque acutis, dupli- 
cato-serratis junioribus glutinosis, venis subtus pubescen- 
tibus pallidis; stipulis oblongis deciduis glutinosis, ramu- 
lis glabris. 
Alnus glutinosa. PuRSH,Flor. Bor. Am.,vol. 2. p. 623, (in part.) 
This tree, like the common Alder of Europe, attains 
the height of 30 or 40 feet, with an erect smooth trunk 
of small diameter, the wood of which is very similar to 
that of the European species, and might, no doubt, be 
employed for the same purposes; it is, however, lighter 
in colour, but of a close grain. 
As an ornamental tree, it is well worth attention, pro- 
ducing an elegant erect top, and affording considerable 
shade by the largeness of its leaves, which are about 3 
inches long by 2J wide. We found it, as usual with 
the plants of this genus, growing along the borders of 
small clear brooks, near the confluence of the Wahla- 
met, but seldom, if ever, on the banks of the larger 
streams which are subject to inundation. In our pro- 
gress to the West, we first observed this tree on the 
borders of the rivers Boisee and Brulee, which pass into 
the Shoshonee, not far from Walla- Walla, and at inter- 
vals it continues more or less common to Point Chin- 
hook, near the shores of the Pacific. 
The twigs are smooth and of a brown colour, and the 
young buds of every kind resinous, as well as the upper 
surface of the younger leaves; beneath, the leaves are 
more or less pubescent, particularly along the veins, 
