Taxon Report

Erigeron blochmaniae Greene

Blochman's leafy daisy

Print Report

Taxon Summary

Erigeron blochmaniae, commonly known as Blochman's leafy daisy, is a perennial rhizomatous herb in the Asteraceae that is found only in California. It occurs within Coastal dunes, and Coastal scrub, growing at elevations from 3 to 45 meters. Erigeron blochmaniae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Erigeron blochmaniae Greene
Common Name:	Blochman's leafy daisy
Family:	Asteraceae
Element Code:	PDAST3M5J0
USDA Plants Symbol:	ERBL4
Synonyms/Other Names:	Erigeron foliosus Nutt. var. blochmaniae (Greene) Hall

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	3-45 (10-150)
General Habitats:	Coastal dunes, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_SBBG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	36
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	2
Fair (C)	2
Poor (D)	1
None (X)	0
Unknown (U)	30

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO), Santa Barbara (SBA)
Quads: Name (Quad Code)
Casmalia (3412075), Guadalupe (3412085), Morro Bay North (3512047), Morro Bay South (3512037), Oceano (3512015), Pismo Beach (3512026), Point Sal (3412086), Santa Maria (3412084), Surf (3412065)

Threat List Data from the CNDDB


Threat List Total:	10
EOs with Threat Listed:	Total EOs	% of EOs
	11	31 %
Recreational use (non-ORV)	4	11%
Development	3	8%
ORV activity	3	8%
Other	2	5%
Non-native plant impacts	2	5%
Road/trail construction/maint.	2	5%
Agriculture	1	2%
Foot traffic/trampling	1	2%
Grazing	1	2%
Mining	1	2%

Notes



Threatened by development, non-native plants, and vehicles. See Pittonia 3:27-28 (1896) 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 11 February 2025].