Taxon Details

Amaranthus watsonii

Watson's amaranth

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Taxon Summary:

Amaranthus watsonii, commonly known as Watson's amaranth, is a annual herb in the Amaranthaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, and Sonoran desert scrub, growing at elevations from 20 to 1700 meters. Amaranthus watsonii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Amaranthus watsonii Standl.
Common Name: Watson's amaranth
Family:	Amaranthaceae
Element Code:	PDAMA04170
USDA Plants Symbol:	AMWA
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G5?
State Rank:	S3
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Sep

Elevation:
20 - 1700 meters
65 - 5580 feet

General Habitats:

Mojavean desert scrub
Sonoran desert scrub

Microhabitat Details:

Microhabitat:

Notes

Notes: Potentially threatened by solar energy development and vehicles. See Bulletin of the Torrey Botanical Club 41:505 (1914) 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	0 %

Occurrence Data from the CNDDB

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

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

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA), Sonora, Mexico (SO)

California Counties and Islands: Name (Code)
Imperial (IMP), Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD), Tulare (TUL)

Quads: Name (Quad Code)
Calexico (3211564), Castle Peaks (3511532), Crescent Peak (3511542), Heber (3211565), Hopkins Well (3311458), Mt. Baldy (3411726), Traver (3611944)

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