Taxon Report

Triteleia lugens Greene

dark-mouthed triteleia

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Taxon Summary

Triteleia lugens, commonly known as dark-mouthed triteleia, is a perennial bulbiferous herb in the Themidaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Coastal scrub, and Lower montane coniferous forest, growing at elevations from 100 to 1000 meters. Triteleia lugens is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Triteleia lugens Greene
Common Name:	dark-mouthed triteleia
Family:	Themidaceae
Element Code:	PMLIL210D0
USDA Plants Symbol:	TRLU4
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	100-1000 (330-3280)
General Habitats:	Broadleafed upland forest, Chaparral, Coastal scrub, Lower montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4?
State Rank:	S4?
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

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: True
California Counties and Islands: Name (Code)
Napa (NAP), San Benito (SBT), Solano (SOL), Sonoma (SON)
Quads: Name (Quad Code)
Bickmore Canyon (3612152), Calistoga (3812255), Glen Ellen (3812235), Kenwood (3812245), Mark West Springs (3812256), Mt. George (3812232), North Chalone Peak (3612142), Sonoma (3812234), St. Helena (3812254)

Threat List Data from the CNDDB


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

Notes



Threatened by development. Related to T. ixioides; needs further study. See Bulletin of the California Academy of Sciences 2(6):142 (1886) for original description, and American Midland Naturalist 25:87-88 (1941) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 October 2025].