Taxon Report

Linanthus concinnus Mlkn.

San Gabriel linanthus

Print Report

Taxon Summary

Linanthus concinnus, commonly known as San Gabriel linanthus, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Chaparral, Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 1520 to 2800 meters. Linanthus concinnus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Linanthus concinnus Mlkn.
Common Name:	San Gabriel linanthus
Family:	Polemoniaceae
Element Code:	PDPLM090D0
USDA Plants Symbol:	LICO2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jul	Apr-Jul
Elevation:	1520-2800 (4985-9185)
General Habitats:	Chaparral, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat:	Openings, Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	43
Element Occurrence Ranks:
Excellent (A)	9
Good (B)	4
Fair (C)	1
Poor (D)	1
None (X)	2
Unknown (U)	26

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), San Bernardino (SBD)
Quads: Name (Quad Code)
Acton (3411842), Chilao Flat (3411831), Condor Peak (3411832), Crystal Lake (3411737), Cucamonga Peak (3411725), Juniper Hills (3411748), Mescal Creek (3411746), Mount San Antonio (3411736), Mt. Baldy (3411726), Mt. Wilson (3411821), Pacifico Mountain (3411841), Telegraph Peak (3411735), Valyermo (3411747), Waterman Mtn. (3411738)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	24	56 %
Road/trail construction/maint.	15	34%
Foot traffic/trampling	9	20%
Development	3	6%
Recreational use (non-ORV)	3	6%
Non-native plant impacts	1	2%

Notes



Threatened by recreational activities and road maintenance. See University of California Publications in Botany 2:53 (1904) 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 5 February 2025].