Spring Birch - Betula occidentalis
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Common across most western and many central counties. Rank may be partly based on hybrids involving this and B. papyrifera.
Small tree or large shrub to ca. 8 m tall with gray to brown bark, only slightly peeling. Twigs glandular, sparsely short-hairy. Leaf blades 2–5 cm long, glandular when young, sparsely white-hairy, rounded to pointed at the tip with sharp-dentate margins. Female catkins 15–25 mm long. Fruit with wings ca. as wide as nutlet (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Western two-thirds of MT and Dawson County; AK and NT to ON, south to CA and NM, east to the Dakotas (Furlow, 1997, in Flora N. Amer. Vol. 3) (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized). Agriculture Handbook No. 541. U.S. Forest Service, Washington, D.C. 375 pp.