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Calochortus coeruleus
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Blue Star Tulip
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Calochortus coeruleus

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About Blue Star Tulip (Calochortus coeruleus) Calochortus coeruleus, often misspelled as Calochortus caeruleus, is a bulbous plant of the lily family. It is known by the common name beavertail grass or blue star tulip. The plant is endemic to California. It is found only in the North California Coast Ranges, Southern Cascade Range, and Northern Sierra Nevada. Calochortus coeruleus is a distinctive plant bearing flowers with light blue spade-shaped petals covered in brushlike hairs. Taxonomy. The botanical name Calochortus caeruleus is not accepted, being an orthographic variant (misspelling) of Calochortus coeruleus. Watson in coining the name in 1875 spelled it "caeruleus" but he also cited Kellogg's 1863 name Cyclobothra coerulea as basionym.
Plant Description
Plant Type
Perennial herb

Max. Height
6 in (15.2 cm)

Flower Color
White, Lavender, Blue

Flowering Season

Native Status

Natural Setting
Site Type
Open gravelly places

Sun, Part Shade

Elevation ?
59' - 8636'

Annual Precip. ?
20.0" - 129.0"

Summer Precip. ?
0.27" - 4.32"

Coldest Month ?
29.7° F - 50.6° F

Hottest Month ?
51.9° F - 75.6° F

Humidity ?
0.31 vpd - 24.44 vpd


Landscaping Information
Nursery Availability
Rarely Available

Other Names
Common Names
Beavertail Grass

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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