Taxon Details

Atriplex subtilis

subtle orache

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Taxon Summary:

Atriplex subtilis, commonly known as subtle orache, is a annual herb in the Chenopodiaceae that is found only in California. It occurs within Valley and foothill grassland, growing at elevations from 40 to 100 meters. Atriplex subtilis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Atriplex subtilis Stutz & G.L. Chu
Common Name: subtle orache
Family:	Chenopodiaceae
Element Code:	PDCHE042T0
USDA Plants Symbol:	ATSU5
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: (Apr)Jun-Sep(Oct)

Elevation:
40 - 100 meters
130 - 330 feet

General Habitats:

Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Alkaline

Notes

Notes: Threatened by agriculture. Possibly threatened by solar energy development. Not in The Jepson Manual (1993). See Madroño 44(2):184 (1997) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	11	46 %
Development	6	25%
Agriculture	5	20%
Foot traffic/trampling	3	12%
Grazing	3	12%
Landfill	1	4%
Mining	1	4%
Altered flood/tidal/hydrologic regime	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					24
A	B	C	D	X	U
3	2	1	0	4	14

Occurrence Status:
Historical >20 Years	22
Recent <=20 Years	2

Presence:
Presumed Extant	20
Possibly Extirpated	2
Presumed Extirpated	2

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Butte (BUT), Fresno (FRE), Kern (KRN), Kings (KNG), Madera (MAD), Merced (MER), Stanislaus (STA), Tulare (TUL)

Quads: Name (Quad Code)
Bliss Ranch (3712014), Bonita Ranch (3612082), Buttonwillow (3511944), Cairns Corner (3611922), Ceres (3712058), Chowchilla (3712013), Denair (3712057), El Nido (3712024), Firebaugh NE (3612083), Goshen (3611934), Gravelly Ford (3612072), Helm (3612051), Jamesan (3612062), Mendota Dam (3612073), Pennington (3912137), Pixley (3511983), Sandy Mush (3712025), Santa Rita Bridge (3712015), Sausalito School (3511982), Wasco SW (3511954), Waukena (3611925)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory