|
paper birch (Betula papyrifera)
(click on each photo to enlarge image)
-
Size: Grows to 70' tall and 2'
in diameter.
-
Leaves: Simple,
alternate, deciduous. Triangular to egg-shaped; 2"-4" long;
margins doubly serrate.
-
Fruit: Tiny
winged nuts borne in a disintegrating cone about 1" long.
-
Twigs: Slender and droopy.
-
Bark: White and
peeling in horizontal strips. Covered with large, horizontal fissures
(called lenticels).
-
Distribution: Grows all across Canada and
the northern-most portions of the United States; occurs sparingly in
the
northeast corner
of Oregon in the Wallowa mountains.
water birch (Betula occidentalis)
(click on each photo to enlarge image)
-
Size: May grow as a shrub or
small tree up to 30' tall.
-
Leaves: Simple,
alternate, deciduous. Roundish; from 1"-2" wide;
coarsely serrated; often sticky.
-
Fruit: Elongated papery cones
that disintegrate at maturity. Tiny winged seeds.
-
Twigs: Slender,
droopy, and covered with sticky dots of resin.
- Bark: Thin, reddish-brown to copper-colored;
may curl but does not peel.
Distribution: Commonly found along streams in the mountainous
regions of eastern Oregon.
For more information about these species
see "Trees
to Know in Oregon".
|
trees
by common name 
