Taxon Report

Arnica viscosa Gray

Mt. Shasta arnica

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Taxon Summary

Arnica viscosa, commonly known as Mt. Shasta arnica, is a perennial rhizomatous herb in the Asteraceae that is found in California and elsewhere. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1705 to 2745 meters. Arnica viscosa is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Arnica viscosa Gray
Common Name:	Mt. Shasta arnica
Family:	Asteraceae
Element Code:	PDAST0Q0R0
USDA Plants Symbol:	ARVI6
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Aug-Sep	Aug-Sep
Elevation:	1705-2745 (5595-9005)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
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)
Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Boulder Peak (4112351), Devils Punchbowl (4112376), English Peak (4112342), Figurehead Mtn. (4112383), McCloud (4112232), Medicine Mtn. (4112343), Mt. Hilton (4012381), Mt. Shasta (4112242), Preston Peak (4112375), Rainbow Mtn. (4112148), Thompson Peak (4112311), Ycatapom Peak (4112217)

Threat List Data from the CNDDB


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

Notes



Endangered in OR. See Proceedings of the American Academy of Arts and Sciences 13:374 (1878) for original description.
Threats:

Taxonomy:

Selected References

Arnica viscosa account for potential Species of Conservation Concern evaluation (2019).

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 19 February 2025].