Trees of the Adirondacks:
Paper Birch (Betula papyrifera)
The Paper Birch (Betula papyrifera) is a small to medium-sized, fast-growing deciduous tree usually found in mixed wood forests in the northern US and Canada, including the Adirondack Mountains. This tree – a close relative of the Yellow Birch (which also grows in our part of the Adirondacks) – is a member of the Birch family. The Paper Birch is short-lived and rarely lives more than 140 years.
The common name derives from the distinctive white bark, which peels off in paper-like layers. This tree is also known as White Birch, Silver Birch, Paperbark Birch, and Canoe Birch. The latter name reflects the use of its bark by native Americans to make canoes.
Identification of the Paper Birch
Paper Birch trees feature a distinctive white bark. The bark of young Paper Birch trees is brownish, but begins to turn white when the tree is about a decade old. The white bark develops paper-like layers. Beneath the loose paper, the tree's inner bark is creamy to pinkish or orangish white. The tree may have dark triangular markings (or chevrons) where the branches have died and fallen off.
The leaves of Paper Birch trees are green in summer, turning yellow in fall. The leaves, which are arranged alternately, are 2 to 5 inches long and one to three inches wide. They are roughly oval in shape, with tapering tips and edges which are double-toothed.
The tiny flowers, borne on catkins, appear in April of May, before or at the same time as the leaves emerge. The yellowish male flowers stand on long, dropping catkins near the twig tip. The green or red female flowers blossom on short, upright catkins father back on the same twig.
The Paper Birch tree's distinctive peeling bark is the main clue to distinguishing it from other deciduous trees in the Adirondacks. The main difficulty is differentiating Paper Birch from Yellow Birch.
- Both Paper Birch and Yellow Birch feature peeling bark. The Paper Birch has bright white bark, the underside of which is a pinkish color. When it peels, the strips are fairly wide, and thick. Yellow Birch bark, by contrast, is more bronze in color; and the bark of the Yellow Birch tends to peel off in thin papery ringlets. This distinction is less helpful in older specimens, when the bark has darkened with age.
- The scent of the stem is another identifier. Scrape a short section of the twig of the birch in question with your fingernail and give it a sniff. If it smells like wintergreen, you have a Yellow Birch.
Uses of the Paper Birch
This tree is used primarily for specialty products such as ice cream sticks, toothpicks, bobbins, clothespins, spools, broom handles, and toys. The bark is also used by crafters to create decorative items. The handsome foliage and showy white bark make the trees attractive for landscaping.
Paper Birch can be tapped in the spring to obtain sap from which syrup, wine, beer, or medicinal tonics can be made. Sap flow season for birch trees begins when the sap flow in Sugar Maples is coming to an end, allowing sugarmakers to use their existing equipment to produce another valuable crop of birch syrup at the close of maple season. Birch syrup contains lower sugar concentrations than that derived from Sugar Maple and is more acidic. Birch syrup has a caramel-like taste and is used in sauces and glazes.
The Paper Birch was used by a wide variety of native American tribes in many different ways. Paper Birch was used as a remedy for a wide variety of ailments, including burns, rashes, stomach cramps, colds, and coughs. Several groups used the sap to make syrup. The root bark was used as a tea substitute and the inner bark as a dye. The bark was also used to make canoes, baskets, and containers. The wood was used to make canoe paddles, toboggans, and snowshoes.
Wildlife Value of the Paper Birch
Paper Birch trees are an important browse plant for animals. Snowshoe Hares, Moose, Eastern Cottontail, Beaver, and Porcupines eat the twigs or bark. Where winter food is inadequate, Paper Birch trees are also browsed by White-tailed Deer. This tree is the larval host for the Canadian Tiger Swallowtail, Luna Moth, and Mourning Cloak.
Paper Birch trees provide food and breeding habitat for a number of birds. Ruffed Grouse eat the seeds and buds of Paper Birch. The seed-filled catkins also feed Black-capped Chickadees, Common Redpolls, Pine Siskins, and Fox Sparrows. Yellow-belled Sapsuckers chip holes in the bark, returning to feed on the sap that pools in the excavations. Several birds, notably Philadelphia Vireos, Red-shouldered Hawks, and Black-throated Green Warblers, use birch strips for nest construction.
The paper birch is a common tree species in the breeding habitat for several species of birds, including:
Distribution of the Paper Birch
The Paper Birch is native in northern North America. This species is widely distributed from northwestern Alaska, east across Canada to Labrador and Newfoundland, south to Pennsylvania and Iowa and in the western states to Montana and northeastern Oregon.
In New York State, the Paper Birch is found in most of the eastern counties, including the Catskills and the Adirondack Mountains. It is one of the most abundant hardwoods in the Adirondacks high peaks region.
Habitat of the Paper Birch
The Paper Birch is a northern species adapted to cold climates and short growing seasons. This species is commonly found in mixed hardwood-conifer forests, but may form nearly pure stands where they pioneer areas disturbed by fires or logging. This tree grows best in the areas where average summer temperatures are not above 70 degrees. The tree does not perform well in harsh conditions or heat and is not tolerant of pollution. Paper Birch trees are found in several ecological communities in the Adirondacks, including pine-northern hardwood forests and successional northern hardwood forests.
Paper Birch is most abundant in disturbed areas, on sites recovering from burns, blowdowns, logging,and other disturbances, manmade and natural. On the Forest Ecosystem Research and Demonstration Area (FERDA) plots at the Paul Smiths VIC, Paper Birch increased in abundance in both the shelterwood and clear cut blocks a decade after the cuts. The Paper Birch is also a common pioneer species on old fields. It usually lasts only one generation, before giving way to more shade-tolerant species.
Look for Paper Birch along many trails in the high peaks and northern Adirondacks. Paper Birch trees, like most other deciduous trees in the Adirondacks, prefer relatively well-drained soils. In contrast to Black Spruce and Tamaracks, Paper Birch trees do not grow in the middle of bogs or on marsh marsh edges. You will often find Paper Birch trees growing near Eastern Hemlock, Balsam Fir, and Hobblebush. Wildflowers often observed growing on the forest floor include Wild Sarsaparilla, Canada Mayflower, and Twinflower.
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