Taxon Details

Cryptantha pterocarya var. stenoloba

narrow-lobed cryptantha

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Taxon Summary:

Cryptantha pterocarya var. stenoloba, commonly known as narrow-lobed cryptantha, is a annual herb in the Boraginaceae that is found only in California. 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:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.1
Fed List:	None
State List:	None
Global Rank:	G5T2T3
State Rank:	S1
Other Status:
CRPR Changes: added to 2B.1 on 2022-07-18
Add Date:	2022-07-18
Date Edited:	2025-07-01

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-Apr

Elevation:
155 - 365 meters
510 - 1200 feet

General Habitats:

Desert dunes

Microhabitat Details:

Microhabitat:

Granitic
Gravelly
Rocky
Sandy

Notes

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.

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					7
A	B	C	D	X	U
0	0	0	0	0	7

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	7

Presence:
Presumed Extant	7
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

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)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Status Review:	Proposed Addition to California Rare Plant Rank 2B.1, G5T2/S1
Original Description:	Journal of the Arnold Arboretum 20: 391 (1939)
Taxonomic Treatment:	Phytotaxa 253: 97–130

CNPS Rare Plant Inventory