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Epilobium obcordatum (Rockfringe)
Bransford, W.D. and Dolphia

Epilobium obcordatum

Epilobium obcordatum A. Gray


Onagraceae (Evening Primrose Family)


USDA Symbol: epob

USDA Native Status: L48 (N)

A low, clumped, mat-forming perennial with 2-6 in. creeping stems. A matted plant with a short creeping stem and, in upper leaf axils, deep pink flowers seemingly too large for plant and often hiding foliage. These stems, with willow-like leaves, are smothered with showy, four-petaled, rose-purple flowers from mid- to late-summer.

Most Epilobium species are tall, but this, like many other alpine plants, is low and compact, which protects it from the drying mountain winds and freezing temperatures.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Class: 0-1 ft.

Bloom Information

Bloom Color: Red , Purple
Bloom Time: Jul , Aug , Sep


USA: CA , ID , NV , OR
Native Distribution: CA Sierras from Tulare & Inyo to Modoc Cos., n. & e. to NV, e. OR & ID
Native Habitat: Dry, alpine & subalpine ridges & flats; 7000 to 13,000 ft.

Growing Conditions

Light Requirement: Sun
Soil Description: Sandy, rocky soil.
Conditions Comments: Not Available


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

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Additional resources

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


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

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