Taxon Report

Linanthus maculatus (Parish) Milliken ssp. emaculatus J.M. Porter, D.S. Bell & R. Patt.

Jacumba Mountains linanthus

Print Report

Taxon Summary

Linanthus maculatus ssp. emaculatus, commonly known as Jacumba Mountains linanthus, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Desert dunes (edges), and Sonoran desert scrub, growing at elevations from 395 to 585 meters. Linanthus maculatus ssp. emaculatus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Linanthus maculatus (Parish) Milliken ssp. emaculatus J.M. Porter, D.S. Bell & R. Patt.
Common Name:	Jacumba Mountains linanthus
Family:	Polemoniaceae
Element Code:	PDPLM041Y2
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: (Mar)Apr(May)	(Mar)Apr(May)
Elevation:	395-585 (1295-1920)
General Habitats:	Desert dunes, Sonoran desert scrub
Microhabitat:	Decomposed granitic, Flats, Sandy, Washes
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G2T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:	added to 1B.1 on 2016-01-27

Occurrence Data from the CNDDB


Total Occurrences:	5
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	4

Location


California Endemic: True
California Counties and Islands: Name (Code)
Imperial (IMP), San Diego (SDG)
Quads: Name (Quad Code)
In-ko-pah Gorge (3211661), Jacumba (3211662)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	2	40 %
Development	2	40%
ORV activity	1	20%

Notes



Discovered in 2010 by L. Hendrickson and L. Sward. Threatened by wind energy development and vehicles. See L. maculatus (in part) in TJM 2. See Aliso 32(2):55-88 (2015) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2016-01-27

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 24 November 2025].