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Native Habitat:

Moist forests, forest edges, and riparian areas throughout western North America, including the Willamette Valley. Prefers rich, well-drained soils with partial shade.

 

Bloom Time:

May – June

 

Growth Habit & Mature Size:

Deciduous shrub or small tree, typically 10–25 feet tall, with multi-stemmed branching and glossy green leaves. Produces small greenish-white flowers, followed by dark purple to black berries in late summer.

 

Light & Soil Requirements:

Partial to full shade; thrives in moist, fertile, well-drained soils. Tolerates seasonal wetness.

 

Willamette Valley Native Companion Plants:

Tolmiea menziesii, Camassia leichtlinii, Polystichum munitum, Achlys triphylla, Adiantum pedatum.

 

Urban Garden Function:

Provides seasonal flowers, berries, and structural interest in shaded urban gardens, riparian plantings, and naturalized landscapes. Works well as an understory shrub, in layered plantings, or as a specimen plant in habitat-focused urban gardens.

 

Wildlife Supported:

Flowers attract native bees and small pollinators. Berries provide food for birds such as thrushes and waxwings. Dense branching offers shelter and nesting habitat for small birds and beneficial insects.

 

Historical Use:

Bark was traditionally used by Indigenous peoples for medicinal purposes, including as a laxative. Wood and berries were occasionally used in crafts and for food preparation.

Frangula purshiana | Cascara

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