CNPS

CNPS Rare Plant Inventory

Species Details

Amaranthus watsonii

Watson's amaranth

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Photo of Amaranthus watsonii
© 2003 Debra Valov 		Photo of Amaranthus watsonii
© 2003 Debra Valov 		Photo of Amaranthus watsonii
© 2004 Debra Valov

  Classification

Scientific Name:
Amaranthus watsonii Standl.
Common Name:
Watson's amaranth
Family: Amaranthaceae
Element Code: PDAMA04170
USDA Plants Symbol: AMWA
Synonyms/Other Names:

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

  Occurrence Data from the CNDDB

Total Occurrences: 0
Element Occurrence Ranks:
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 19 April 2024].