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Northern Willow Herb
Epilobium ciliatum

About Northern Willow Herb (Epilobium ciliatum) Epilobium ciliatum is a species of willowherb known by the common names Fringed Willowherb and American Willowherb. This plant is found in many parts of the world. It is native to much of North America and eastern Asia, and it is an introduced species in much of Eurasia and Australia. It may be found in a great variety of habitats, including disturbed areas and roadsides. This is a clumping perennial often exceeding one and a half meters 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 flower cluster are covered in bristly hairs and glands. The 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. The fruit is a narrow, hairy capsule up to 10 centimeters in length, and it may be held on a long stalk.
Plant Description
Plant Type
Perennial herb

Max. Height
1.6 - 6 ft (0.49 - 1.8 m)

Flower Color
Pink, White, Purple

Native Status

Natural Setting
Site Type
Disturbed places, moist meadows, streambanks


Elevation ?
-75' - 12554'

Annual Precip. ?
4.1" - 158.0"

Summer Precip. ?
0.14" - 5.80"

Coldest Month ?
19.0° F - 56.6° F

Hottest Month ?
42.2° F - 87.2° F

Humidity ?
0.01 vpd - 38.66 vpd

Landscaping Information
Water Requirement ?
Low, Moderate - High
Extremely Low
Very Low
Moderate - High

Common uses
Bird Gardens, Hummingbird Gardens

Nursery Availability
Rarely Available

Other Names
Common Names
American Willowherb, Fringed Willowherb, Northern Willow-herb, Slender Willow-herb

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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