Taxon Report

Erigeron robustior (Cronq.) Nesom

robust daisy

Print Report

Taxon Summary

Erigeron robustior, commonly known as robust daisy, is a perennial herb in the Asteraceae that is found only in California. It occurs within Lower montane coniferous forest, and Meadows and seeps, growing at elevations from 200 to 610 meters. Erigeron robustior is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Erigeron robustior (Cronq.) Nesom
Common Name:	robust daisy
Family:	Asteraceae
Element Code:	PDAST3M134
USDA Plants Symbol:
Synonyms/Other Names:	Erigeron decumbens Nutt. var. robustior Cronq.

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Jul	Jun-Jul
Elevation:	200-610 (655-2000)
General Habitats:	Lower montane coniferous forest, Meadows and seeps
Microhabitat:	Serpentine (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
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: True
California Counties and Islands: Name (Code)
Humboldt (HUM), Trinity (TRI)
Quads: Name (Quad Code)
Blake Mountain (4012355), Board Camp Mtn. (4012366), Dinsmore (4012345), Fort Seward (4012326), Larabee Valley (4012346), Ruth Reservoir (4012334), Yager Junction (4012357)

Threat List Data from the CNDDB


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

Notes



See Madroño 35(2):81-82 (1988) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Erigeron robustior profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 1 November 2025].