Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Betula pumila L. image
Photographer: Derek Anderson           

Botanical Illustration

Hugh H. Iltis

Kenneth J. Sytsma

Kenneth J. Sytsma
Family Betulaceae
Betula pumila L.
bog birch, dwarf birch, swamp birch
Betula: ancient Latin name
pumila: dwarf
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: perennial, erect, coarse, irregular shrub 4'-13' tall; smooth bark dark reddish brown; pale, inconspicuous lenticels; often forming large colonies; twigs not tasting or smelling like wintergreen
Flower: male catkin 1/3"-3/4" long on 1/4"-1/3" stalks; blooms in late spring
Fruit:cylindrical, erect fruit clusters; samara wings slightly narrower than the body, widest near the middle
Leaf:stiff, elliptic to obovate to widely ovate; broadly-round above and at the base; edges coarsely toothed
Habitat: moist to wet; bogs, calcareous fens, wooded swamps, muskegs, lakeshores
Notes: often hybirdizes

More Information Natural Communities Herbarium Specimens
All Betula list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
Betula borealis Spach
Betula glandulifera (Regel) B.T.Butler
Betula glandulosa Michx. var. glandulifera (Regel) Gleason
Betula glandulosa Michx. var. hallii (T.J.Howell) C.L.Hitchc.
Betula hallii T.J.Howell
Betula nana L. var. glandulifera (Regel) B.Boivin
Betula pubescens Ehrh. subsp. borealis (Spach) A.Löve & D.Löve
Betula pumila L. var. glandulifera Regel
Betula pumila L. var. glabra Regel
Betula pumila L. var. pumila
Betula pumila L. var. renifolia Fernald

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