Taxon Details

Lewisia oppositifolia

opposite-leaved lewisia

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Taxon Summary:

Lewisia oppositifolia, commonly known as opposite-leaved lewisia, is a perennial herb in the Montiaceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, growing at elevations from 300 to 1220 meters. Lewisia oppositifolia is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Lewisia oppositifolia (Wats.) Rob.
Common Name: opposite-leaved lewisia
Family:	Montiaceae
Element Code:	PDPOR040B0
USDA Plants Symbol:	LEOP
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.2
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S2
Other Status:	USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2025-07-01

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Apr-May(Jun)

Elevation:
300 - 1220 meters
985 - 4005 feet

General Habitats:

Lower montane coniferous forest (mesic)

Microhabitat Details:

Microhabitat:

Notes

Notes: On watch list in OR.
Threats: Threatened by logging, mining, and vehicles.
Taxonomy: CA plants possibly hybrids with L. nevadensis.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	8	57 %
Road/trail construction/maint.	4	28%
ORV activity	3	21%
Mining	2	14%
Recreational use (non-ORV)	2	14%
Other	1	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					14
A	B	C	D	X	U
1	1	2	0	0	10

Occurrence Status:
Historical >20 Years	9
Recent <=20 Years	5

Presence:
Presumed Extant	14
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Del Norte (DNT)

Quads: Name (Quad Code)
Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Hurdygurdy Butte (4112377), Shelly Creek Ridge (4112387)

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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Original Description:	Proceedings of the American Academy of Arts and Sciences 20:355 (1885)
Taxonomic Treatment:	Synoptical Flora of North America 1(1[2]): 268. 1897
Species Account:	Lewisia oppositifolia profile for potential Species of Conservation Concern evaluation (2018)

CNPS Rare Plant Inventory