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Damasonium californicum
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Fringed Water-plantain
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Damasonium californicum

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About Fringed Water-plantain (Damasonium californicum) Damasonium californicum is a species of perennial wildflower in the water plantain family which is known by the common name Fringed Water-plantain, or Star Water-plantain. This is a plant of wet environments in the western United States from Idaho, Oregon, Nevada, California, Montana, Washington State. Damasonium californicum is a resident of ponds, riversides, and vernal pools. This is a tough-stemmed plant which may live submersed in water or erect on mud or moist soils. It has long, narrow leaves consisting of a thin blade at the end of a long petiole. The inflorescence yields a flower at the end of each of several long peduncles. The flower has three white or pink petals, each with toothed or fringed ends and sometimes a yellow spot at the base. At the center are six short stamens. After the flower withers the fruits develop into flat, beaked achenes, several achenes gathered into a star-shaped bunch.
Plant Description
Plant Type
Perennial herb

Max. Height
1.5 ft (0.46 m)


Growth Rate

Flower Color
White, Pink, Yellow

Flowering Season

Native Status

Natural Setting
Elevation ?
6' - 6804'

Annual Precip. ?
7.0" - 47.2"

Summer Precip. ?
0.20" - 2.71"

Coldest Month ?
26.5° F - 49.9° F

Hottest Month ?
55.9° F - 75.6° F

Humidity ?
0.45 vpd - 25.65 vpd

Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Star Water-plantain, California Damsonium

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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