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Taxon  Report  
Epilobium ciliatum  Raf.
Fringed willowherb,   Northern willow herb,   Slender willow herb
Epilobium ciliatum is a perennial herb that is native to California, and also found elsewhere in North America and beyond.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial

Bloom Period
Subspecies and Varieties:
Genus: Epilobium
Family: Onagraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Communities: Sagebrush Scrub, Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Subalpine Forest, Foothill Woodland, Chaparral, Valley Grassland, Alpine Fell-fields, Pinyon-Juniper Woodland, wetland-riparian, many plant communities

Name Status:
Accepted by JEF + PLANTS

Information about  Epilobium ciliatum from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora


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[wikipedia] Description, Distribution, Habitat: Epilobium ciliatum, known by the common names fringed willowherb,[1] American willowherb,[2] slender willow herb, and northern willow herb is a species of flowering plant in the willowherb family Onagraceae. This species is native to much of North America, southern South America, and East Asia. It is an introduced species in much of Eurasia and Australia.[3] This perennial herbaceous plant usually occurs in wetlands, but may be found in a great variety of habitats, including disturbed areas and roadsides, at elevations below 1,400 metres (4,600 ft).[3] Description Epilobium ciliatum is a clumping perennial often exceeding 1.5 metres (4.9 ft) in height. It has thickly veined lance-shaped leaves which may be up to 15 centimeters long toward the base of the plant. The foliage, stem, and inflorescence are covered in bristly hairs and glands.[4] There are four sepals. The regular, trumpet-shaped flowers have four petals which are so deeply notched they look like four pairs. They are white to light purple or pink with dark veining.[4] There are eight stamens and a club-shaped stigma. The fruit is a narrow, hairy, four-chambered capsule up to 10 centimeters in length which may be held on a long stalk. The seeds are downy and can float for long distances with the wind.[5] Subspecies Three subspecies are currently recognized: Epilobium ciliatum ssp. ciliatum [6][7] Epilobium ciliatum ssp. glandulosum (Lehm.) Hoch & P.H.Raven [8][9] Epilobium ciliatum ssp. watsonii (Barbey) Hoch & P.H.Raven[10][11] Taxonomy Epilobium ciliatum may be a cryptic species complex. The Rocky Mountain Willowherb (Epilobium saximontanum) is sometimes included as yet another subspecies. The three currently recognized subspecies may each constitute a distinct species. If so, E. ciliatum ssp. watsonii would perhaps use the name E. adenocaulon and include those populations, while E. ciliatum ssp. glandulosum would perhaps use the name E. bergianum and include those populations. The others named E. ciliatum ssp. ciliatum populations would remain. Distribution and habitat Epilobium ciliatum is native to the southern part of Canada and most of the United States of America. It arrived in northern Europe early in the 20th century and spread rapidly, reaching Finland in about 1920. It is a plant of moist places, stream-sides, ditches, ponds, gardens, roadsides, recently cleared areas and wasteland.[5] (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/17/2024).