Taxon Report

Cryptantha pterocarya (Torr.) Greene var. stenoloba I. M. Johnst.

narrow-lobed cryptantha

Print Report

Taxon Summary

Cryptantha pterocarya var. stenoloba, commonly known as narrow-lobed cryptantha, is a annual herb in the Boraginaceae that is . It occurs within Desert dunes, growing at elevations from 155 to 365 meters. Cryptantha pterocarya var. stenoloba is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Cryptantha pterocarya (Torr.) Greene var. stenoloba I. M. Johnst.
Common Name:	narrow-lobed cryptantha
Family:	Boraginaceae
Element Code:	PDBOR0A2E4
USDA Plants Symbol:	CRPTS
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Mar-Apr	Mar-Apr
Elevation:	155-365 (510-1200)
General Habitats:	Desert dunes
Microhabitat:	Granitic, Gravelly, Rocky, Sandy
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.1
Global Rank:	G5T2T3
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 2B.1 on 2022-07-18

Occurrence Data from the CNDDB


Total Occurrences:	7
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	7

Location


California Endemic: False
California Counties and Islands: Name (Code)
Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Arica Mountains (3411418), Gene Wash (3411432), Grommet (3411416), Rice (3411417), Roosevelt Mine (3311457)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	14 %
ORV activity	1	14%

Notes




Threats:
Threatened by urbanization, solar energy development, vehicles, non-native plants, and grazing.
Taxonomy:
Differs from other varieties of C. pterocarya in its narrow, elongate calyx lobes.

Selected References

Proposed Addition to California Rare Plant Rank 2B.1, G5T2/S1

Journal of the Arnold Arboretum 20: 391 (1939)

Phytotaxa 253: 97–130

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 April 2025].