Taxon Report

Erigeron mariposanus Congd.

Mariposa daisy

Print Report

Taxon Summary

Erigeron mariposanus, commonly known as Mariposa daisy, is a perennial herb in the Asteraceae that is found only in California. It occurs within Cismontane woodland, growing at elevations from 600 to 800 meters. Erigeron mariposanus is ranked 1A, Plants Presumed Extirpated in California and Either Rare or Extinct Elsewhere.

Classification


Scientific Name:	Erigeron mariposanus Congd.
Common Name:	Mariposa daisy
Family:	Asteraceae
Element Code:	PDAST3M5L0
USDA Plants Symbol:	ERMA15
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	600-800 (1970-2625)
General Habitats:	Cismontane woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1A
Global Rank:	GX
State Rank:	SX
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	1
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Mariposa (MPA)*
Quads: Name (Quad Code)
Mariposa (3711948)*

Threat List Data from the CNDDB


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

Notes



Suspected to have occurred in specialized habitat. Last seen in 1900. See Erythea 7:185 (1900) for original description, and Phytologia 72(3):157-208 (1992) for taxonomic treatment.
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 10 February 2025].