264 Part II. 
Tsuga Mertensiana Bong. (=T. he- 
terophylla Sarg.). 
Common up to 4000 feet. 
Tsuga Pattoniana Jeffr. (= T. Mer- 
tensiana Sarg.). 
Common up to 4000 feet. 
Cupressus (Chamaecyparis) nootka- 
ensis Lamb. 
Mountain slopes above 2000 feet. 
Picea sitchensis Carr. 
Along streams up to an altitude 
of 2000 feet. 
Picea Engelmanni Engelm. 
High altitudes. 
Abies amabilis Forb. 
On moist land and northern se 
up to 4000 feet. 
*Abies nobilis Lindl. 
Rainier Forest. 
*Abies concolor Lindl. & Gord. 
Rainier Forest. 
Abies subalpina Engelm 
carpa Nutt.). 
On higher slopes and summit. 
Pinus monticola Dougl. 
Medium altitudes, or bench lands 
and lower mountain slopes. 
Pinus ponderosa Laws. 
Dry slopes of the Skagit Valley 
north of Lightning Creek. 
Pinus Murrayana Oreg. Com. (= P. 
contorta var. Murrayana Engelm.). 
Dry bench lands northward to 
international boundary. 
Pinus albicaulis Engelm. 
High altitudes. 
= A. lasio- 
The trees noted in the list”) are also dominant west of Puget Sound Bi. 
the Olympic Mountains, which rise from the Pacific Ocean, so that the 2. 
species may be said to represent the forest vegetation of the northwest abeg 
tes 
ı) Ayres, H. B.: Washington Forest Reserve. Nineteenth Annual Report United Sta 
283. 
Geological Survey 1897—98: 
Chapter 3. 
Larix Lyalli Parl. 
Summit Cascade Range northward. 
*Larix occidentalis Nutt. 
Rainier Forest. 
Taxus brevifolia Nutt. 
Populus trichocarpa Hook. ‘ 
Common along streams in lov r 
altitudes. 
Cornus Nuttallii Audub, 
On bench land in lower altitud 
Pyrus (Malus) rivularis Dougl. 
ommon on low wet land. 
Populus balsamifera L. 
Occurs sparingly on the upf 
Skagit and eastward. 
Populus tremuloides Michx. 
Northward and eastward in 
Skagit drainage. 3 
Betula papyrifera Marsh. “ 
In the Skagit Valley; abun 
above Ruby Creek, rare ber 
Acer macrophyllum Pursh. 
Along streams below 2000 1er 
Acer circinatum Pursh. 
Common below 3000 feet. 
Alnus oregana Nutt. : 
Common along streams in in In 
altitudes. 
Fraxinus Oregana Nutt. 
Rainier Forest. 
Quercus Garryana Dougl. 
Rainier Forest. 
Rhamnus Purshiana DC. = 
Common on moist land in lo 
valleys as a small under tree. 
