Taxon Report

Romneya coulteri Harv.

Coulter's matilija poppy

Print Report

Classification


Scientific Name:	Romneya coulteri Harv.
Common Name:	Coulter's matilija poppy
Family:	Papaveraceae
Element Code:	PDPAP0L010
USDA Plants Symbol:	ROCO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Mar-Jul(Aug)	Mar-Jul(Aug)
Elevation:	20-1200 (65-3935)
General Habitats:	Chaparral, Coastal scrub
Microhabitat:	Burned areas (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4
State Rank:	S4
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)
Los Angeles (LAX), Orange (ORA), Riverside (RIV), San Bernardino (SBD), San Diego (SDG)
Quads: Name (Quad Code)
Alberhill (3311764), Barrett Lake (3211666), Black Star Canyon (3311776), Cajon (3411734), Canada Gobernadora (3311755), Corona South (3311775), Dulzura (3211667), El Cajon (3211678), El Monte (3411811), El Toro (3311766), Jamul Mountains (3211668), Lake Elsinore (3311763), Lake Mathews (3311774), Malibu Beach (3411816), Mt. Wilson (3411821), Otay Mesa (3211658), Otay Mountain (3211657), Pasadena (3411822), Prado Dam (3311786), Riverside East (3311783), San Clemente (3311745), San Juan Capistrano (3311756), Santiago Peak (3311765), Steele Peak (3311773), Wildomar (3311753), Yorba Linda (3311787)

Threat List Data from the CNDDB


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

Notes



Threatened by urbanization, flood control, road widening, and road maintenance.
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 4 January 2025].