Largetooth Aspen (PI)
Populus grandidentata Michx.
Peuplier à grandes dents
Common Name: Largetooth Aspen, Bigtooth Aspen
Family: Salicaceae

Native Range: Primarily found in eastern North America, though not extending as far west, east, or north as trembling aspen. Usually occurs on drier sites.
Canadian Plant Hardiness Zones: Hardy to Zone 2.

Size & Growth
Typical Height: ~20 m high.
Maximum Recorded Height: Up to 20 m.
Trunk Diameter: ~30 cm diameter.
Growth Rate: Moderate to fast, but slower than trembling aspen.
Typical Lifespan: ~60 years, can be longer on a suitable site.
Record Age:

Leaf: Simple, 5 ⇔ 10 centimeters, blunt tip, broadly ovate, uneven large teeth; bright green.
Bud: Stout, reddish-brown; buds blunt. 0.7 ⇔ 0.8 centimeters length.
Twig: Moderately coarse, dull brownish-gray, downy when the leaves are unfolding, with lenticels that are orange.
Rhytidome: Smooth greenish-white in saplings; darker with age. May have diamond shaped marks present 1 cm across.

Reproduction & Life Cycle
Seed Maturity: Seeds ripen 4 ⇔ 6 weeks after flowering, typically around late spring to early summer.
Reproductive Cycle: Good seed crops occur every 4 ⇔ 5 years.
Pollination Method: Wind.
Seed Dispersal Mechanism: Wind.
Seed Dormancy Requirements: Seeds generally require cold stratification for optimal germination.

Environmental Preferences
Soil Preferences: Well drained uplands; mixed forests. Unsightly on a dry poor site.
Water Needs: Moderate to high, prefers consistent moisture.
Drought Tolerance: Low drought tolerance, struggles on dry, poor soils.
Flood Tolerance: Moderate flood tolerance.
Shade Tolerance: Low (prefers full sun).
Root System Type: Shallow, wide-spreading root system.
Climate Adaptability: Prefers temperate climates, especially on fertile soils; can be found on drier sites, but growth is scrubby on poor soils.

Physical & Chemical Properties
Wood Density: Approximately 400 ⇔ 450 kg/m³.
Strength Rating: Low, used for less demanding applications like oriented strand board (OSB) and chipboard.
Decay Resistance: Low to moderate, not particularly resistant to decay.
Fire Resistance: Low fire resistance.
Fire Regeneration Ability: Aspen trees, including largetooth aspen, regenerate quickly through root sprouting after disturbances such as fire.

Ecological Role & Interactions
Wildlife Value: Provides habitat and food for wildlife, including beavers, deer, and many insects. The leaves are also food for a variety of insects.
Companion Species: Mixed stands with trembling aspen, white birch, eastern white pine, balsam fir, white spruce, willows, and alders.
Invasive Status: Not invasive... can dominate disturbed sites and form small, pure stands. Root networks can be fire tolerant.
Threats: Susceptible to pests like the aspen borer and diseases like powdery mildew.

Human & Cultural Uses
Traditional Uses: Historically used for medicinal purposes by Indigenous peoples, and its wood was utilized in making various crafts and tools.
Modern Uses: The wood is used in the manufacture of oriented strand board (OSB), plywood, and other engineered wood products.
Symbolism/Mythology: Known for its large teeth on the leaves, which have made it a symbol of resilience and endurance in harsh environments.

Additional Notes & Fun Facts
Unique Features: Like trembling aspen, largetooth aspen can form clonal groves through root sprouting. These clones allow the tree to quickly regenerate after disturbances.
Interesting Historical Facts: Typically found in smaller, more isolated stands compared to trembling aspen and is more commonly found in drier, poorer soils.
Rare/Endangered Varieties: No rare varieties known, still considered important in maintaining biodiversity by providing shelter and food for various species.