Taxon Report

Erythronium howellii Wats.

Howell's fawn lily

Print Report


© 2021 Scot Loring

  Classification
Scientific Name:
 Erythronium howellii Wats.
Common Name:
 Howell's fawn lily
Family: Liliaceae
Element Code: PMLIL0U080
USDA Plants Symbol: ERHO10
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial bulbiferous herb
Blooming Period: Apr-May Apr-May
Elevation: 200-1145 (655-3755)
General Habitats: Lower montane coniferous forest, North Coast coniferous forest
Microhabitat: Serpentine (sometimes)
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.3
Global Rank: G3G4
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:
  • removed from 1B.3 on 2013-02-01

Occurrence Data from the CNDDB
Total Occurrences: 11
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 0
   Fair (C) 1
   Poor (D) 0
   None (X) 0
   Unknown (U) 10

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Del Norte (DNT), Siskiyou (SIS)
Quads: Name (Quad Code)
Takilma (4212315), Broken Rib Mtn. (4112386), Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Hurdygurdy Butte (4112377), Polar Bear Mtn. (4112385), Shelly Creek Ridge (4112387)

Threat List Data from the CNDDB

Threat List Total: 3
EOs with Threat Listed: Total EOs % of EOs
2 18 %
Logging 1 9%
Mining 1 9%
Road/trail construction/maint. 1 9%

Notes
Possibly threatened by logging and associated road use. Endangered in OR. A synonym of E. citrinum in TJM (1993) and TJM 2. See Proceedings of the American Academy of Arts and Sciences 22:480 (1887) for original description, and Madroño 3(2):89 (1935) for taxonomic treatment.
Threats:
Taxonomy:

Selected References

CRPR List Deletion on 2013-02-01
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 4 January 2025].