Betula papyrifera Marshall
American white birch, paper birch, canoe birch, silver birch, American birch, white birch
The American white birch or paper birch is a native of North America. Papyrifera means “paper”—the white, peelable bark is smooth and paperlike. Please don’t peel bark from these trees—it can kill them! Birch bark is impregnated with resins, so much so that the wood in fallen trees rots while leaving the bark intact.
Plants: The paper birch reaches about 60′ (18 m) in height, rarely up to twice that. The trunk (sometimes multiply stemmed) is typically bright white, up to 1′ (30 cm) in diameter, with a peeling, papery bark. However, young trees consist of a reddish bronze bark that does not peel, and sometimes, especially in western trees, this bark remains throughout the tree’s life. Trees tend to be pyramidal when young, becoming more irregular as they age.
Leaves: Alternate, ovate, toothed, with pointed tips; dark green above, pale green below, yellow in the fall.
Flowers: Both male and female flowers occur on the same tree. Male flowers are catkins 2–4″ (5–10 cm) long. Female flowers are also catkins, 1–1½″ (2.5–3.8 cm) long. They appear from March to April.
Fruits: Female flowers are followed by drooping cone-like fruits containing numerous small winged seeds.
Habitats: Moist, acidic, sandy or rocky, well-drained soils.
Online References:
References:
Petrides, George A., Peterson Field Guides: Trees and Shrubs, Houghton Mifflin Co., 1972, p. 231, 338
Little, Elbert L., National Audubon Society Field Guide to North American Trees, Eastern Region, Alfred A. Knopf, 1980, p. 179, 615, 368
Little, Elbert L., National Audubon Society Field Guide to Trees, Western Region, Alfred A. Knopf, Inc., 1980, p. 206, 383
Symonds, George W. D.; photos by Chelminski, Stephen V., The Tree Identification Book, Harper, 2003, p. 44
7/2/2016 · Nashua River Rail Trail, Groton, Groton, Massachusetts 
8/15/2015 · Grafton Notch State Park, Newry, Maine · ≈ 1 × 2′ (39 × 59 cm) 
1/1/2012 · Big Tree Trail • Tudor Richards Natural History and Forest Trail, Hollis, New Hampshire 
1/1/2012 · Big Tree Trail • Tudor Richards Natural History and Forest Trail, Hollis, New Hampshire 
5/10/2016 · Old Long Loop, Beaver Brook Conservation Area, Hollis, New Hampshire 
11/30/2011 · Nashua River Rail Trail, Groton 
3/9/2012 · Groton Place and Sabine Woods, Groton, Massachusetts · ≈ 14 × 9″ (35 × 23 cm) 
The raised horizontal patches—lenticels—are part of the tree’s “respiratory system,” allowing gas exchange. · 8/15/2015 · Grafton Notch State Park, Newry, Maine · ≈ 8 × 12″ (21 × 31 cm) 
11/30/2011 · Nashua River Rail Trail, Groton 
Not sure what titanic force ripped this tree out of the ground. · 4/14/2021 · Wolfe’s Neck Woods State Park, Freeport, Maine 
5/10/2016 · Old Long Loop, Beaver Brook Conservation Area, Hollis, New Hampshire 
12/10/2011 · Groton Place and Sabine Woods, Groton, Massachusetts · ≈ 1 × 2′ (41 × 62 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Fagales | Birch, she-oak, beech, walnut, bayberry, others |
| Family | Betulaceae | Birch family: birches, alders, hazels, hornbeams and hop-hornbeams |
| Genus | Betula | Birch |
| Species | papyrifera | From papyrus, once used for paper, for the paper-like bark |
Betula papyrifera description by Thomas H. Kent, not updated.
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