Tilia americana
Overview
The American Basswood is a large native hardwood valued for its broad canopy, fragrant summer flowers, and importance to pollinators. Found throughout the Appalachian region and much of eastern North America, it is commonly recognized by its heart-shaped leaves and dense shade.
American Basswood grows naturally in rich forests, stream valleys, and moist woodlands. Its impressive size, attractive foliage, and ecological benefits have also made it a popular landscape and shade tree in parks, campuses, and residential areas.
Identification
Leaves
- Large, heart-shaped leaves with pointed tips
- Finely toothed margins
- Dark green during the growing season
- Yellow fall color
Bark
- Smooth and gray on young trees
- Develops long ridges and furrows with age
Flowers
- Small, pale yellow flowers that appear in early summer
- Highly fragrant
- Produced in clusters attached to a leaf-like bract
Fruit
- Small, round nut-like fruits that develop in hanging clusters
- Seeds are dispersed by wind with the aid of the attached bract
Size
- Typically grows 60 to 80 feet tall
- Can exceed 100 feet under favorable conditions
- Forms a broad, rounded canopy
Native Range
American Basswood is native to eastern North America and occurs naturally throughout much of the Appalachian region. It is found in West Virginia, Ohio, and Kentucky, where it commonly grows in rich coves, mesic forests, and fertile bottomlands.
Ecology and Wildlife Value
American Basswood is one of the most valuable native trees for pollinators. Its nectar-rich flowers attract a wide variety of bees, butterflies, and other insects during the summer flowering season. Basswood honey is especially prized by beekeepers for its distinctive flavor and aroma.
The seeds provide food for birds and small mammals, while mature trees offer nesting sites, shelter, and cover for wildlife. As a large canopy tree, Basswood also contributes to urban forest health by providing shade, reducing stormwater runoff, and improving air quality.
Human Uses and Cultural Significance
American Basswood has long been valued for its lightweight, soft wood, which is easy to carve and work with.
Historically, Basswood has been used for:
- Furniture
- Carvings
- Musical instruments
- Veneer
- Pulp and paper products
- Wooden-ware and specialty items
The tree’s fibrous inner bark was also used by Indigenous peoples to make ropes, mats, baskets, and cordage.
American Basswood at Marshall University
American Basswoods contribute to the diversity of the Marshall University Arboretum and provide important habitat for pollinators and other wildlife. Their large canopies create shaded outdoor spaces that support learning, recreation, and enjoyment of the campus landscape.
Quick Facts
Common Name: American Basswood
Scientific Name: Tilia americana
Family: Malvaceae
Native Region: West Virginia Native
Mature Height: 60-80 feet (occasionally 100+ feet)
Mature Spread: 30-60 feet
Growth Rate: Medium to fast
Sun Requirements: Full sun to partial shade
Soil Preferences: Rich, moist, well-drained soils
USDA Hardiness Zones: 3-8
Bloom Period: June to July
Fruit/Seed: Small nut-like fruits in hanging clusters
Wildlife Value: Important nectar source for pollinators; provides food and habitat for wildlife
Notable Characteristics: Heart-shaped leaves, fragrant flowers, and exceptional value to pollinators