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Primula hendersonii

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About Mosquito Bills (Primula hendersonii) Dodecatheon hendersonii is a species of Dodecatheon native to western North America, from California north to southern British Columbia and Idaho. In California, it occurs in the northwest (except the north coast), the Cascade Range, the Sierra Nevada foothills, the Central Valley, the San Francisco Bay Area, the north Inner South Coast Ranges, and the San Bernardino Mountains. It is generally found in open woodlands, from sea level in British Columbia, up to 1900 meter altitude in California. Common names include broad-leaved shooting star, Henderson's shooting star, mosquito bills, and sailor caps. D. hendersonii is summer deciduous, dying back to the ground after the rains cease. It has basal clumps of leaves, 2-16 centimeter, with nodding flowers 6-25 millimeter long on stems 10-30 centimeter tall. The flowers are magenta to deep lavender to white, with the stamens are thrust out and the sepals bent back. It is highly variable and hybridizes with Dodecatheon clevelandii, from which it can be distinguished by its reddish or purplish stem.
Plant Description
Plant Type
Perennial herb

Max. Height
4 - 11.8 in (10.2 - 30 cm)

Summer Deciduous

Basal clumps of leaves, 2-16 centimeters

Flower Color
Pink, Lavender

Flowering Season
Spring, Winter

Native Status

Natural Setting
Shade, Part Shade

Elevation ?
10' - 8590'

Annual Precip. ?
12.8" - 126.5"

Summer Precip. ?
0.19" - 3.85"

Coldest Month ?
31.6° F - 50.7° F

Hottest Month ?
53.5° F - 77.8° F

Humidity ?
0.14 vpd - 26.55 vpd

Soil Description
Needs good drainage

Sunset Zones ?
7*, 8, 9, 14*, 15, 16, 17, 18*, 19, 20, 21, 22, 23, 24

Landscaping Information
Nursery Availability
Sometimes Available

Other Names
Botanical Names
Dodecatheon hendersonii

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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