E-Flora BC: Electronic Atlas of the Flora of British Columbia

Betula neoalaskana Sarg.
Alaska paper birch (northwestern white birch; resin birch)
Betulaceae (Birch family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #26105)

E-Flora BC Static Map
Distribution of Betula neoalaskana
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Species Information

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General:
Deciduous tree, 10-30 m tall; young twigs with yellowish, wartlike resin glands; bark thin, smooth, pale and papery.
Leaves:
Alternate, deciduous, wedge-shaped in outline, doubly saw-toothed, thin and membranous, glabrous below, usually 2.5-8 cm long; leaf stalks more than 1 cm long.
Flowers:
Male and female flowers in separate catkins 2-4 cm long; flowers emerging before or with the leaves; catkins breaking up at maturity.
Fruits:
Nutlets with broad wings, at least twice as wide as the body of the nutlet; bracts with rounded, lateral lobes.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet bogs, fens, swamps or moist forest sites in the montane zone; frequent in NE BC; N to AK, YT and NT and E to ON.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Betula neoalaskana

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 305 712 1815
Slope Gradient (%) 0 8 80
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 74 330
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 4 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
85
Modal BEC Zone Class
BWBS
All BEC Zones (# of stations/zone) species was recorded in: BWBS(76), ESSF(1), ICH(1), SBS(1), SWB(2)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Betula alaskana Sarg.
Betula papyrifera subsp. humilis (Regel) HultTn
Betula papyrifera var. humilis (Regel) Fern. & Raup
Betula papyrifera var. neoalaskana (Sarg.) Raup
Betula resinifera Britt.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References