Taxon Report

Erythronium revolutum Sm.

coast fawn lily

Print Report


©2007 Steve Matson

Taxon Summary

Erythronium revolutum, commonly known as coast fawn lily, is a perennial bulbiferous herb in the Liliaceae that is found in California and elsewhere. It occurs within Bogs and fens, Broadleafed upland forest, and North Coast coniferous forest, growing at elevations from 0 to 1600 meters. Erythronium revolutum is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Erythronium revolutum Sm.
Common Name:
 coast fawn lily
Family: Liliaceae
Element Code: PMLIL0U0F0
USDA Plants Symbol: ERRE5
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial bulbiferous herb
Blooming Period: Mar-Jul(Aug) Mar-Jul(Aug)
Elevation: 0-1600 (0-5250)
General Habitats: Bogs and fens, Broadleafed upland forest, North Coast coniferous forest
Microhabitat: Mesic, Streambanks
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 2B.2
Global Rank: G4G5
State Rank:
 S3
State List: None
Fed List: None
Other Status: SB_UCSC
CRPR Changes:
  • changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB
Total Occurrences: 172
Element Occurrence Ranks:
   Excellent (A) 24
   Good (B) 80
   Fair (C) 41
   Poor (D) 8
   None (X) 0
   Unknown (U) 19

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Ah Pah Ridge (4112348), Bailey Ridge (3912324), Bald Hills (4112328), Black Lassic (4012335), Blue Lake (4012388), Board Camp Mtn. (4012366), Bridgeville (4012347), Buckeye Mtn. (4012432), Bull Creek (4012431), Childs Hill (4112461), Cold Spring (3912315), Comptche (3912335), Dinsmore (4012345), Dubakella Mtn. (4012342), Ettersburg (4012328), Eureka (4012472), French Camp Ridge (4112327), Garberville (4012317), Gasquet (4112378), Grouse Mtn. (4012376), Hennessy Peak (4012375), Holter Ridge (4112338), Hupa Mountain (4112317), Iaqua Buttes (4012368), Johnsons (4112337), Klamath Glen (4112358), Korbel (4012378), Leggett (3912376), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Maple Creek (4012377), Miranda (4012327), Myers Flat (4012337), Navarro (3912325), Owl Creek (4012358), Philo (3912314), Piercy (3912387), Salyer (4012385), Scotia (4012441), Sherwood Peak (3912355), Tan Oak Park (3912375), Taylor Peak (4012442), Weed (4112244), Weitchpec (4112326), Yager Junction (4012357)

Threat List Data from the CNDDB

Threat List Total: 12
EOs with Threat Listed: Total EOs % of EOs
148 86 %
Logging 141 81%
Road/trail construction/maint. 36 20%
Other 28 16%
Erosion/runoff 21 12%
Foot traffic/trampling 17 9%
Grazing 13 7%
Over-collecting/poaching 4 2%
Non-native plant impacts 3 1%
Mining 2 1%
Wood cutting or brush clearing 2 1%
Altered flood/tidal/hydrologic regime 1 0%
Recreational use (non-ORV) 1 0%

Notes
On watch list in OR, and state-listed as Sensitive in WA. See Madroño 3(2):93-99 (1935) for taxonomic treatment.
Threats:
Threatened by logging, non-native plants, vehicles, and road maintenance. Possibly threatened by grazing.
Taxonomy:

Selected References

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 5 February 2025].