Basswood (Bd)
Tilia americana L.
American Linden
Family: Malvaceae (Mallow Family)
Native Range: Eastern and central North America, from Canada to the southeastern United States. Often found in rich, moist soils in deciduous forests.
Introduced Range: Occasionally planted as an ornamental tree in urban and suburban areas outside its native range.
Canadian Plant Hardiness Zones: Zones 2 to 7
Size & Growth
Typical Height: ~35 meters.
Maximum Recorded Height:
Trunk Diameter: Typically 50 to 80 centimeters; a large tree can exceed 100 centimeters.
Growth Rate: Medium to fast.
Typical Lifespan: ~ 200 years.
Record Age:
Leaves: Simple, 12 ⇔ 15 centimeters, thick, elongated tip, heart-shaped, serrated; soft texture. Massive gorgeous leaves, larger in shaded parts.
Rhytidome: Smooth waxy greenish white on saplings; darker when mature with furrows that develop with age, 1 cm diamond patterns may arise
Twigs: Slender, yellowish brown twigs; buds pointed, reddish.
Flowers: Small, pale yellow, highly fragrant.
Fruit: Round, nut-like capsules covered in fine brown hairs, produced in abundance almost yearly.
Reproduction & Life Cycle
Seed Maturity: Around 15 years.
Reproductive Cycle: Produces flowers and seeds annually.
Pollination Method: Insect-pollinated, primarily by bees.
Seed Dispersal Mechanism: Wind and gravity.
Seed Dormancy Requirements: Requires cold stratification for germination.
Environmental Preferences
Soil Preferences: Prefers deep, fertile, well drained soils; tolerates slightly acidic to neutral pH.
Water Needs: Moderate; thrives in moist environments but does not tolerate prolonged flooding.
Drought Tolerance: Moderate; can handle occasional dry periods but prefers consistent moisture.
Flood Tolerance: Low; susceptible to root rot in poorly drained conditions.
Shade Tolerance: High; can grow in shaded understory but thrives in partial to full sun.
Root System Type: Deep, spreading root system with suckering tendencies.
Climate Adaptability: Conditioned for temperate climates with cold winters and warm summers.
Physical & Chemical Properties
Wood Density: Medium; lightweight and soft.
Strength Rating: Low; not suitable for heavy structural uses.
Decay Resistance: Low; susceptible to rot if exposed to moisture for extended periods.
Fire Resistance: Low; thin bark makes it vulnerable to fire damage.
Fire Regeneration Ability: Can regenerate from stump sprouts after fire damage.
Ecological Role & Interactions
Wildlife Value: Provides nectar for pollinators, especially bees; seeds and buds are eaten by small mammals and birds.
Companion Species: Often found growing with sugar maple, American beech, white ash, and red oak in mixed hardwood forests.
Invasive Status: Not considered invasive.
Threats: Susceptible to fire damage, fungal infections, and insect pests like Japanese beetles and aphids.
Human & Cultural Uses
Traditional Uses: Indigenous peoples used basswood for rope, baskets, and medicinal remedies. The inner bark was used to treat wounds and fevers.
Modern Uses: Valued for its lightweight, fine-grained wood, making it ideal for carving, furniture, plywood, and musical instruments. Also used in beekeeping due to its nectar-rich flowers.
Symbolism/Mythology: Sometimes associated with love and protection due to its heart-shaped leaves.
Unique Features: Known for its ability to sprout new shoots from stumps, forming clumps of trees.
Interesting Historical Facts: Basswood was historically used in Indigenous canoe-making and later became a favored wood for crafting intricate sculptures.
Rare/Endangered Varieties: Not endangered, but some local populations may be at risk due to habitat loss.