Rough Western Hackberry (Celtis occidentalis var. aspera)

Rough-leaved hackberry Rough common hackberry

Silhouette: T. Michael Keesey / License

Celtis occidentalis var. aspera: Guide to the Rough-Leaved Hackberry

Characterized by its exceptionally rough-textured foliage, Celtis occidentalis var. aspera stands out as a unique botanical variety of the common hackberry. This tree naturally inhabits the eastern and central regions of North America, showing remarkable tolerance to diverse soil conditions. It serves as an important component of native deciduous forests and riparian zones.

The variety is recognized by taxonomists for its rugged nature and adaptability. It can withstand harsh winters and hot, dry summers alike. Wildlife species depend on its canopy and fruit for shelter and nourishment throughout the year.

Taxonomy

∟ царство Plantae
∟ division Tracheophytes (Vascular Plants)
∟ subdivision Spermatophytes (Seed plants)
∟ Angiosperms
∟ mesangiosperms
∟ eudicots
∟ Superrosids
∟ rosids
∟ order Rosales
∟ family Cannabaceae (Hemp family)
∟ genus Celtis (Hackberry)
∟ species Celtis occidentalis (Common Hackberry)
∟ variety Celtis occidentalis var. aspera (Rough Western Hackberry)

Morphology

The physical structure of Celtis occidentalis var. aspera is defined by several distinct features:

Foliage: The leaves are ovate with an asymmetrical base, featuring a highly rough (scabrous) upper surface that feels like fine sandpaper.
Bark: The mature trunk displays grayish-brown bark with corky, wart-like ridges that provide visual texture.
Flowers: Small, greenish flowers appear in spring, arranged in clusters along the current year's twigs.
Fruit: Spherical drupes ripen to a deep purple or reddish-black hue, containing a single hard seed surrounded by sweet flesh.

Flowering season

Spring

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Name

Dec

Applications

This hardy tree offers practical value in ecological restoration and land management:

Windbreaks and Shelters: Due to its dense branching and resilience, it is planted in shelterbelts to protect soils from wind erosion.
Wildlife Support: The nutrient-rich drupes are a critical food source for migratory birds and small mammals during the winter months.
Wood Utilization: The heavy, close-grained wood is occasionally used for manufacturing fencing, pallets, and rough lumber.

Interesting facts

The history and biology of this tree include several fascinating aspects:

Native American Heritage: Various indigenous tribes used the sweet drupes of the hackberry for food and traditional medicinal applications.
Sandpaper Leaves: The rough texture of the leaves is caused by microscopic mineral deposits in the epidermal cells.
Urban Survivor: This variety demonstrates high tolerance to air pollution and compacted soils, making it exceptionally tough.

Geography of distribution

United States
Canada

Sources

Plants of the World Online (POWO): Documented as an infraspecific variety of the Celtis occidentalis species.
World Flora Online (WFO): Cataloged within the global database of vascular plant species.
Global Biodiversity Information Facility (GBIF): Preserves distribution maps and herbarium specimen records.
Tropicos (Missouri Botanical Garden): Nomenclature and original publication citations are maintained.