Taxon Report

Gilia yorkii Shevock & A. G. Day

Monarch gilia

Print Report

Taxon Summary

Gilia yorkii, commonly known as Monarch gilia, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 1290 to 1830 meters. Gilia yorkii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Gilia yorkii Shevock & A. G. Day
Common Name:	Monarch gilia
Family:	Polemoniaceae
Element Code:	PDPLM04230
USDA Plants Symbol:	GIYO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jul	May-Jul
Elevation:	1290-1830 (4230-6005)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Carbonate
Microhabitat Details:	carbonate outcrops

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	USFS_S
CRPR Changes:	changed from 1B.2 to 1B.1 on 2016-06-09

Occurrence Data from the CNDDB


Total Occurrences:	3
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE)
Quads: Name (Quad Code)
Wren Peak (3611877)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	3	100 %
Non-native plant impacts	3	100%

Notes



Known only from near Boyden Cave in Kings River Cyn. Threatened by non-native plants. Not in The Jepson Manual (1993). See Madroño 45(2):137 (1998) 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 9 November 2025].