Taxon Details

Oenothera longissima

long-stem evening-primrose

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Taxon Summary:

Oenothera longissima, commonly known as long-stem evening-primrose, is a annual/perennial herb in the Onagraceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, and Pinyon and juniper woodland, growing at elevations from 1000 to 1700 meters. Oenothera longissima is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Oenothera longissima Rydb.
Common Name: long-stem evening-primrose
Family:	Onagraceae
Element Code:	PDONA0C0T0
USDA Plants Symbol:	OELO
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:	G4
State Rank:	S1
Other Status:
CRPR Changes: added to 2.2 on 2006-12-27
Add Date:	2006-12-27
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: annual/perennial herb

Blooming Period: Jul-Sep

Elevation:
1000 - 1700 meters
3280 - 5580 feet

General Habitats:

Mojavean desert scrub
Pinyon and juniper woodland

Microhabitat Details:

Microhabitat:

Mesic (sometimes)

Notes

Notes: Known in California from only Inyo and San Bernardino Counties. See Bull. Torrey Bot. Club 40: 65 (1913) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					4
A	B	C	D	X	U
0	0	0	0	0	4

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	1

Presence:
Presumed Extant	4
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Colorado (CO), Nevada (NV), New Mexico (NM), Utah (UT)

California Counties and Islands: Name (Code)
Inyo (INY), San Bernardino (SBD)

Quads: Name (Quad Code)
Bighorn Basin (3411576), Deep Springs Lake (3711831), Fountain Peak (3411585), Ivanpah (3511533)

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 Rare Plant Inventory