Taxon Report

Linanthus jaegeri (P.A. Munz) J.M. Porter & L.A. Johnson

San Jacinto linanthus

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Taxon Summary

Linanthus jaegeri, commonly known as San Jacinto linanthus, is a perennial herb in the Polemoniaceae that is found only in California. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 2195 to 3050 meters. Linanthus jaegeri is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Linanthus jaegeri (P.A. Munz) J.M. Porter & L.A. Johnson
Common Name:	San Jacinto linanthus
Family:	Polemoniaceae
Element Code:	PDPLM08030
USDA Plants Symbol:	LIJA2
Synonyms/Other Names:	Leptodactylon jaegeri (Munz) Wherry

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	2195-3050 (7200-10005)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Granitic, 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:	7
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	5

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV)
Quads: Name (Quad Code)
Palm Springs (3311675), San Jacinto Peak (3311676)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	2	29 %
Recreational use (non-ORV)	2	28%
Foot traffic/trampling	1	14%
Other	1	14%

Notes



Known from fewer than ten occurrences in the San Jacinto Mtns. Possibly threatened by recreational activities. A synonym of Leptodactylon jaegeri in The Jepson Manual. See Bull. S. Calif. Acad. Sci. 31: 68 (1932) for original description, and Aliso 19(1):55-91 (2000) for revised nomenclature.
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 31 December 2025].