Populus grandidentata
Copyright, Trees of
Wisconsin Copyright, The Ohio
Department of Natural Resources and The Ohio State Universit
Department of Horticulture and Crop Science, 2002 Bigtooth Aspen is a
medium-sized tree that grows up to 60 feet tall. The
trunk
is one to two feet wide. It has rounded leaves
about four inches long with large teeth.
Leaves turn yellow in the fall. Aspens get
flowers
early in the spring, before they get their leaves. Aspen
flowers are called catkins.
Catkins are 2 to 3 inches long, tan-colored, and
droopy. Later, catkins are
replace with fruits.
Bigtooth Aspen fruits have small seeds
combined with silky hairs. They travel by wind to new
places, where they may be able to grow into a new tree. One
tree can make over a million seeds. Bigtooth Aspens do not
like shade. They usually grow on the edges of woods or along
streams. They grow fast, but do not live long. These trees
live for about 50 years. Copyright, The Ohio
Department of Natural Resources and The Ohio State Universit
Department of Horticulture and Crop Science, 2002




Paul Wray, Iowa State University
The bark
of Bigtooth Aspen is mostly smooth, gray, and thin. At the
bottom of the trunk (the first three feet), there are orange
furrows
(wrinkles). Bigtooth Aspens are often
found with the following plants: Red Maple, Gray Birch,
Eastern White Pine, Virginia Pine,American Beech, Eastern
Redcedar, White Oak, Pin Oak, Basswood, Black Cherry,
Sassafras, Flowering Dogwood, Black Willow, blueberries,
Bracken Fern, Smooth Sumac, Witch Hazel, Mapleleaf Viburnum,
Black Locust, and Wild Strawberry. Copyright, The Ohio
Department of Natural Resources and The Ohio State Universit
Department of Horticulture and Crop Science, 2002 Bill Cook, Michigan State
University Copyright, Brooklyn
Botanical Garden Copyright, The Ohio
Department of Natural Resources and The Ohio State Universit
Department of Horticulture and Crop Science, 2002 Bigtooth Aspen often gets
crowded out by Red Maple, Eastern White Pine, and oaks.
Aspens are an important
food source for many animals, and are the favorite food of
Beaver. Beaver eat twigs, leaves, and bark. They also used
branches to make dams. White-tailed Deer,
Muskrat, and Eastern Cottontail eat leaves and twigs.
Buds
are eaten by Purple Finch. Seeds are eaten by Carolina
Chickadee and American Goldfinch.




Mourning Cloak, Viceroy, and European Gypsy Moth all eat leaves and use Bigtooth Aspen as a host plant.
Meadow Voles eat bark.
Aspens are often used by Hairy Woodpeckers and Yellow-bellied Sapsuckers for making nest cavities. Later, other animals will use the cavities, such as squirrels, Great Crested Flycatchers, and Black Rat Snakes.
Aspens are host for many fungus parasites, including Artist's Conk, Honey Mushroom, Oyster Mushroom, and False Tinder Polypore.
Other mushrooms have a special relationship that helps aspens, including Fly Agaric and Red-capped Scaber Stalk. This is called a mycorrhizal relationship, where the fungus and the tree give each other nutrients.
Relationships in Nature:
Animals
Using as Food Source Animals
Using as Shelter Associations
With Other Plants Yellow-bellied Sapsucker Black Locust Gray Birch Pin Oak
Relationship to Humans:
People use Bigtooth Aspen wood to make pulp (paper), boxes, and crates.