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Vine Hill Clarkia Back to Plant Page
Clarkia imbricata

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About Vine Hill Clarkia (Clarkia imbricata) Clarkia imbricata is a rare species of flowering plant in the evening primrose family known by the common name Vine Hill clarkia. It is endemic to Sonoma County, California, where it is known from only one remaining natural occurrence near Vine Hill. A second natural population located on private land was extirpated when the owners plowed up the soil crust. The California Native Plant Society has established a third population from cuttings and is tending it in a reserve. This is a federally listed endangered species. Vine Hill clarkia is an annual herb growing erect to about half a meter in maximum height. The leaves are lance-shaped and about 2 centimeters long. The flower cluster is a dense array of open flowers and erect closed flower buds. The four sepals separate when the flower opens. The petals are fan-shaped with frilly edges, measuring 2 to 2.5 centimeters long. They are lavender with a wash of white near the base and a wedge of darker lavender above. There are 8 stamens with anthers of equal size, and a protruding stigma.
Plant Description
Plant Type
Annual herb

Max. Height
1 - 2 ft (0.3 - 0.6 m)

Flower Color
Pink, Lavender

Native Status
Natural Setting
Site Type
Open places


Elevation ?
145' - 279'

Annual Precip. ?
39.1" - 42.2"

Summer Precip. ?
0.40" - 0.41"

Coldest Month ?
45.1° F - 45.4° F

Hottest Month ?
71.0° F - 71.4° F

Humidity ?
0.42 vpd - 16.90 vpd

Landscaping Information
Common uses
Butterfly Gardens, Bee 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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