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Epilobium cleistogamum
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Selfing Willowherb
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Epilobium cleistogamum

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About Selfing Willowherb (Epilobium cleistogamum) Epilobium cleistogamum is a species of willowherb known by the common name selfing willowherb. This plant is endemic to central California where it is a resident of vernal pools and mudflats. It is a small annual plant with fuzzy pointed green leaves. Some of the leaves have hairs which are knobby and gland-tipped. The flowers are usually cleistogamous, that is, they self-pollinate without opening. Some of the flowers do open to reveal pinkish-purple to nearly white, deeply notched petals. The fruit is a tough four-sided capsule about a centimeter long.
Plant Description
Plant Type
Annual herb

Max. Height
0.49 - 1.1 ft (0.15 - 0.34 m)

Flower Color
Pink, White, Purple

Native Status

Natural Setting
Elevation ?
2' - 5640'

Annual Precip. ?
9.7" - 40.0"

Summer Precip. ?
0.18" - 1.18"

Coldest Month ?
32.0° F - 50.6° F

Hottest Month ?
62.7° F - 78.4° F

Humidity ?
0.92 vpd - 25.89 vpd

Landscaping Information
Common uses
Hummingbird Gardens

Nursery Availability
Never or Almost Never Available

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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