Taxon Report

Munzothamnus blairii (Munz & I. M. Johnst.) P. H. Raven

Blair's munzothamnus

Print Report

Taxon Summary

Munzothamnus blairii, commonly known as Blair's munzothamnus, is a perennial shrub in the Asteraceae that is found only in California. It occurs within Coastal bluff scrub, and Coastal scrub, growing at elevations from 25 to 455 meters. Munzothamnus blairii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Munzothamnus blairii (Munz & I. M. Johnst.) P. H. Raven
Common Name:	Blair's munzothamnus
Family:	Asteraceae
Element Code:	PDAST8U0K0
USDA Plants Symbol:
Synonyms/Other Names:	Stephanomeria blairii Munz & I. M. Johnst.

Ecology and Life History


Lifeform:	perennial shrub
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	25-455 (80-1495)
General Habitats:	Coastal bluff scrub, Coastal scrub
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	26
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	26

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX)
Quads: Name (Quad Code)
San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873)

Threat List Data from the CNDDB


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

Notes



Feral herbivores removed from SCM Isl., and vegetation recovering. See Bulletin of the Torrey Botanical Club 51:301 (1924) for original description.
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 26 October 2025].