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Epilobium rigidum (Siskiyou rock fringe)
Bransford, W.D. and Dolphia

Epilobium rigidum

Epilobium rigidum Hausskn.

Siskiyou Rock Fringe, Stiff Willowherb

Onagraceae (Evening Primrose Family)

Synonym(s): Epilobium rigidum var. canescens


USDA Native Status: L48 (N)

A clumped, mat-forming perennial, to 16 in. high, with creeping stems. These stems, with gray-felted, willow-like leaves, are smothered with pale pink or lavener flowers from mid- to late-summer.

This plant thrives in hot summers and wet winters.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Class: 1-3 ft.

Bloom Information

Bloom Color: Pink , Purple
Bloom Time: Jul , Aug


Native Distribution: Del Norte, Co., CA to s.w. OR
Native Habitat: Sandy & rocky benches below 3000 ft.

Growing Conditions

Light Requirement: Sun
Soil Description: Sandy, nutrient-poor soils.
Conditions Comments: Requires hot summers and wet winters.


Description: Propagate by seed.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes

Additional resources

USDA: Find Epilobium rigidum in USDA Plants
FNA: Find Epilobium rigidum in the Flora of North America (if available)
Google: Search Google for Epilobium rigidum


Record Modified: 2007-01-01
Research By: TWC Staff

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