Species Details

Erythronium tuolumnense

Tuolumne fawn lily

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Species Description:

Erythronium tuolumnense, commonly known as Tuolumne fawn lily, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 510 to 1365 meters. Erythronium tuolumnense is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Erythronium tuolumnense Appleg.
Common Name: Tuolumne fawn lily
Family:	Liliaceae
Element Code:	PMLIL0U0H0
USDA Plants Symbol:	ERTU
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2G3
State Rank:	S2S3
Other Status:	BLM_S; SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-06-03

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Mar-Jun

Elevation:
510 - 1365 meters
1675 - 4480 feet

General Habitats:

Broadleafed upland forest
Chaparral
Cismontane woodland
Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Notes

Notes:
Threats: Threatened by logging, vehicles, horticultural collecting, reforestation with herbicides, mining, and non-native plants. Possibly threatened by non-native plants, grazing, and mining.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	14
	Total EOs	% of EOs
EOs with Threat Listed:	22	63 %
Grazing	10	28%
Road/trail construction/maint.	7	20%
Vandalism/dumping/litter	6	17%
Logging	6	17%
Non-native plant impacts	6	17%
Mining	4	11%
Recreational use (non-ORV)	3	8%
Biocides	2	5%
ORV activity	2	5%
Other	1	2%
Over-collecting/poaching	1	2%
Erosion/runoff	1	2%
Foot traffic/trampling	1	2%
Agriculture	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					35
A	B	C	D	X	U
6	9	3	0	0	17

Occurrence Status:
Historical >20 Years	19
Recent <=20 Years	16

Presence:
Presumed Extant	35
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Tuolumne (TUO)

Quads: Name (Quad Code)
Columbia (3812014), Columbia Se (3812013), Crandall Peak (3812022), Duckwall Mtn. (3712081), Standard (3712083), Tuolumne (3712082), Twain Harte (3812012)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory