Taxon Report

Calochortus uniflorus Hook & Arn.

pink star-tulip

Print Report

Species Description:
Calochortus uniflorus, commonly known as pink star-tulip, is a perennial bulbiferous herb in the Liliaceae that is found in California and elsewhere. It occurs within Coastal prairie, Coastal scrub, Meadows and seeps, and North Coast coniferous forest, growing at elevations from 10 to 1070 meters. Calochortus uniflorus is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Calochortus uniflorus Hook & Arn.
Common Name:	pink star-tulip
Family:	Liliaceae
Element Code:	PMLIL0D1F0
USDA Plants Symbol:	CAUN
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	10-1070 (35-3510)
General Habitats:	Coastal prairie, Coastal scrub, Meadows and seeps, North Coast coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_SBBG
CRPR Changes:	changed from 4.3 to 4.2 on 2010-03-04 added to 4.3 on 2010-03-04

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: False
California Counties and Islands: Name (Code)
Colusa (COL), Lake (LAK), Marin (MRN), Mendocino (MEN), Monterey (MNT), Napa (NAP), San Mateo (SMT), Santa Cruz (SCR), Shasta (SHA), Sonoma (SON)
Quads: Name (Quad Code)
Aetna Springs (3812264), Cahto Peak (3912365), Clearlake Highlands (3812286), Detert Reservoir (3812265), Duncans Mills (3812341), Felton (3712211), Hagaman Gulch (4012157), Kenwood (3812245), Laytonville (3912364), Leesville (3912224), Marina (3612167), Middletown (3812275), Plantation (3812353), San Mateo (3712253), San Rafael (3712285), Santa Rosa (3812246), Stewarts Point (3812364), Wilbur Springs (3912214)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



Threatened by agriculture, development, and non-native plants.
Threats:

Taxonomy:

Selected References

Proposed Addition to CRPR 4.2, G4 / S3 (2010)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 12 January 2025].