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Yellow Star Tulip Back to Plant Page
Calochortus monophyllus

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About Yellow Star Tulip (Calochortus monophyllus) Calochortus monophyllus is a species of flowering plant in the lily family known by the common name yellow star-tulip. It is native to the foothills of the Sierra Nevada and southernmost Cascades in California, its range probably extending north just into Oregon. It is a perennial herb producing a slender, sometimes branched stem up to about 20 centimeters tall. The basal leaf is 10 to 30 centimeters in length and does not wither at flowering. There may be smaller leaves located along the stem. The flower cluster bears 1 to 6 erect, bell-shaped flowers. Each flower has three pointed sepals and three more rounded petals, all bright to deep yellow. The petals may have some dark reddish spotting at the bases and are coated densely with yellow hairs on the inner surfaces. The fruit is a winged capsule one or two centimeters long.
Plant Description
Plant Type
Perennial herb

Max. Height
8.4 in (21.3 cm)

Flower Color
Yellow, Red

Native Status

Natural Setting
Site Type
Wooded slopes, clayloam soils

Sun, Part Shade, Full Shade

Elevation ?
116' - 6762'

Annual Precip. ?
23.6" - 78.0"

Summer Precip. ?
0.45" - 2.08"

Coldest Month ?
37.6° F - 52.0° F

Hottest Month ?
58.4° F - 75.7° F

Humidity ?
1.77 vpd - 25.39 vpd

Slow, Medium

Sunset Zones ?
7*, 9, 14, 15, 16, 17, 18, 19, 20, 21

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Yellow Star-tulip

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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