Taxon Report

Euphrosyne acerosa (Nutt.) Panero

copperwort

Print Report

Taxon Summary

Euphrosyne acerosa, commonly known as copperwort, is a perennial shrub in the Asteraceae that is found in California and elsewhere. It occurs within Meadows and seeps (alkaline), and Playas (saline), growing at elevations from 60 to 900 meters. Euphrosyne acerosa is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Euphrosyne acerosa (Nutt.) Panero
Common Name:	copperwort
Family:	Asteraceae
Element Code:	PDAST58010
USDA Plants Symbol:
Synonyms/Other Names:	Iva acerosa

Ecology and Life History


Lifeform:	perennial shrub
Blooming Period: May-Dec	May-Dec
Elevation:	60-900 (195-2955)
General Habitats:	Meadows and seeps, Playas
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4G5
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)
Inyo (INY)
Quads: Name (Quad Code)
Bole Spring (3611633), Death Valley Junction (3611634), Furnace Creek (3611647), Resting Spring (3511682), Shoshone (3511683), Tecopa (3511672)

Threat List Data from the CNDDB


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

Notes



See University of Kansas Scientific Bulletin 41:793-876 (1960) for revised nomenclature.
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 24 October 2025].