Cascara Buckthorn
Frangula purshiana · Rhamnaceae (Buckthorn family)
AI-generated identification · may be incorrect
Leaf Morphology
Leaf Type
Simple, deciduous leaf
Shape
Elliptical to oblong-ovate with an acute apex and rounded to tapering base
Margin
Finely serrate or denticulate (toothed), sometimes appearing slightly wavy
Arrangement
Alternate, with prominent slender petioles
Venation
Pinnate venation with 10 to 15 pairs of prominent, parallel-running lateral veins extending straight toward the margin
Key Features
Straight parallel lateral veins (10-15 pairs), finely toothed margins, alternate arrangement, and fine hairs on the lower leaf surface
Description
Cascara Buckthorn is a small tree or large shrub growing up to 10-20 feet tall with smooth grey-brown bark, inconspicuous greenish flowers, and distinctive dark purple to black berry-like fruits. The leaves are prominent for their straight, parallel veins running out from the midrib.
Habitat
Understory of coniferous and mixed forests, riparian zones, and moist mountain slopes, preferring moist, well-draining soils and partial shade
Native Range
Native to western North America, stretching from British Columbia south through Washington, Oregon, and California, extending inland to Idaho and Montana