Taxon Report

Arnica cernua Howell

serpentine arnica

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© 2021 Scot Loring

Taxon Summary

Arnica cernua, commonly known as serpentine arnica, is a perennial rhizomatous herb in the Asteraceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, growing at elevations from 500 to 1920 meters. Arnica cernua is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

  Classification
Scientific Name:
 Arnica cernua Howell
Common Name:
 serpentine arnica
Family: Asteraceae
Element Code: PDAST0Q040
USDA Plants Symbol: ARCE
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial rhizomatous herb
Blooming Period: Apr-Jul Apr-Jul
Elevation: 500-1920 (1640-6300)
General Habitats: Lower montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.3
Global Rank: G5
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:  False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Blue Creek Mtn. (4112347), Broken Rib Mtn. (4112386), Chicken Hawk Hill (4112214), Childs Hill (4112461), Chimney Rock (4112356), Dees Peak (4112313), Devils Punchbowl (4112376), Fish Lake (4112336), Grouse Mtn. (4012376), Hamburg (4112371), High Divide (4112481), High Plateau Mtn. (4112388), Hoopa (4112316), Hupa Mountain (4112317), Johnsons (4112337), Kangaroo Mtn. (4112382), Klamath Glen (4112358), Lonesome Ridge (4112346), Preston Peak (4112375), Shelly Creek Ridge (4112387), Slater Butte (4112373), Willow Creek (4012386)

Threat List Data from the CNDDB

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

Notes
Possibly threatened by logging.
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 23 February 2025].