Taxon Report

Erythronium citrinum Wats. var. roderickii Shevock & Allen

Scott Mountains fawn lily

Print Report

Taxon Summary

Erythronium citrinum var. roderickii, commonly known as Scott Mountains fawn lily, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 550 to 1600 meters. Erythronium citrinum var. roderickii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Erythronium citrinum Wats. var. roderickii Shevock & Allen
Common Name:	Scott Mountains fawn lily
Family:	Liliaceae
Element Code:	PMLIL0U042
USDA Plants Symbol:	ERCIR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: Mar-Jun	Mar-Jun
Elevation:	550-1600 (1805-5250)
General Habitats:	Lower montane coniferous forest
Microhabitat:	Rocky (often), Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4T3T4
State Rank:	S3S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 1B.3 to 4.3 on 2019-04-22

Occurrence Data from the CNDDB


Total Occurrences:	66
Element Occurrence Ranks:
Excellent (A)	21
Good (B)	34
Fair (C)	7
Poor (D)	0
None (X)	0
Unknown (U)	4

Location


California Endemic: True
California Counties and Islands: Name (Code)
Shasta (SHA), Trinity (TRI)
Quads: Name (Quad Code)
Carrville (4112216), Chicken Hawk Hill (4112214), Covington Mill (4012287), Damnation Peak (4012285), Mumbo Basin (4112225), Tangle Blue Lake (4112226), Trinity Center (4012286), Whisky Bill Peak (4112215), Ycatapom Peak (4112217)

Threat List Data from the CNDDB


Threat List Total:	12
EOs with Threat Listed:	Total EOs	% of EOs
	57	86 %
Logging	49	74%
Road/trail construction/maint.	19	28%
Erosion/runoff	6	9%
Biocides	3	4%
Foot traffic/trampling	2	3%
Grazing	1	1%
Vandalism/dumping/litter	1	1%
Wood cutting or brush clearing	1	1%
ORV activity	1	1%
Other	1	1%
Over-collecting/poaching	1	1%
Recreational use (non-ORV)	1	1%

Notes



Not in TJM (1993). See Phytologia 71(2):101-103 (1991) for original description.
Threats:
Threatened by logging and vehicles. Possibly threatened by road construction and maintenance, and erosion.
Taxonomy:

Selected References

CRPR List Change on 2019-04-22

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].