Taxon Report

Oenothera longissima Rydb.

long-stem evening-primrose

Print Report

Classification


Scientific Name:	Oenothera longissima Rydb.
Common Name:	long-stem evening-primrose
Family:	Onagraceae
Element Code:	PDONA0C0T0
USDA Plants Symbol:	OELO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual/perennial herb
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	1000-1700 (3280-5580)
General Habitats:	Mojavean desert scrub, Pinyon and juniper woodland
Microhabitat:	Mesic (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12 added to 2.2 on 2006-12-27

Occurrence Data from the CNDDB


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

Location


California Endemic: False
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)

Threat List Data from the CNDDB


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

Notes



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

Taxonomy:

Selected References

CRPR List Addition on 2006-12-27

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 January 2025].