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Western Rock-jasmine Back to Plant Page
Androsace occidentalis

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About Western Rock-jasmine (Androsace occidentalis) Androsace occidentalis is a species of flowering plant in the primrose family known by the common name western rockjasmine. It is native to much of southern Canada and the central United States, where it occurs in open habitat such as prairie, especially in moist areas. This is a diminutive annual herb reaching a maximum height of about 7 centimeters. It grows from a basal rosette of oblong hairy leaves no more than one or two centimeters long. It produces an erect inflorescence which is an umbel atop a thin, naked peduncle. The umbel is composed of 5 to 10 tiny flowers, each on a pedicel up to 3 centimeters long. The flowers have a white or pinkish five-lobed corolla inside a cup of pointed reddish sepals.
Plant Description
Plant Type
Perennial herb, Annual herb

Max. Height
2.8 in (7.1 cm)

Native Status

Natural Setting
Elevation ?
5130' - 10814'

Annual Precip. ?
57.6" - 71.9"

Summer Precip. ?
1.53" - 2.47"

Coldest Month ?
24.3° F - 39.6° F

Hottest Month ?
45.3° F - 62.4° F

Humidity ?
1.67 vpd - 15.62 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Western Rockjasmine

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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