Taxon Details

Atriplex argentea var. longitrichoma

Pahrump orache

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Taxon Summary:

Atriplex argentea var. longitrichoma, commonly known as Pahrump orache, is a annual herb in the Chenopodiaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, growing at elevations from 640 to 850 meters. Atriplex argentea var. longitrichoma is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Atriplex argentea Stutz, G.L. Chu, & S.C. Sanderson var. longitrichoma S.L. Welsh
Common Name: Pahrump orache
Family:	Chenopodiaceae
Element Code:	PDCHE04056
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G5T2
State Rank:	S2
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes: added to 1B.1 on 2010-07-29
Add Date:	2010-07-29
Date Edited:	2023-05-02

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-May

Elevation:
640 - 850 meters
2100 - 2790 feet

General Habitats:

Mojavean desert scrub

Microhabitat Details:

Microhabitat:

Alkaline
Disturbed areas
Roadsides

Notes

Notes: Threatened by development and vehicles. See Madroño 45(2): 128 (1998) for original description, and Rhodora 102: 421 (2001) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	6	75 %
ORV activity	6	75%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					8
A	B	C	D	X	U
4	3	0	0	0	1

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	8

Presence:
Presumed Extant	8
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
Inyo (INY)

Quads: Name (Quad Code)
Nopah Peak (3611611), Sixmile Spring (3611621), Stewart Valley (3611622), Tecopa Pass (3511671), Twelvemile Spring (3611612)

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