Taxon Report

Atriplex coronata Wats. var. coronata

crownscale

Print Report


© 1994 Robert E. Preston, Ph.D.

Taxon Summary

Atriplex coronata var. coronata, commonly known as crownscale, is a annual herb in the Chenopodiaceae that is found only in California. It occurs within Chenopod scrub, Valley and foothill grassland, and Vernal pools, growing at elevations from 1 to 590 meters. Atriplex coronata var. coronata is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

  Classification
Scientific Name:
 Atriplex coronata Wats. var. coronata
Common Name:
 crownscale
Family: Chenopodiaceae
Element Code: PDCHE040C3
USDA Plants Symbol: ATCOC
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Mar-Oct Mar-Oct
Elevation: 1-590 (5-1935)
General Habitats: Chenopod scrub, Valley and foothill grassland, Vernal pools
Microhabitat: Alkaline, Clay (often)
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.2
Global Rank: G4T3
State Rank:
 S3
State List: None
Fed List: None
Other Status: SB_CalBG/RSABG
CRPR Changes:

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

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Fresno (FRE), Kern (KRN), Kings (KNG), Merced (MER), Monterey (MNT), San Benito (SBT), San Luis Obispo (SLO), Solano (SOL), Stanislaus (STA), Tulare (TUL)
Quads: Name (Quad Code)
Allensworth (3511974), Altamont (3712166), Antioch North (3812117), Antioch South (3712187), Brentwood (3712186), Byron Hot Springs (3712176), California Valley (3512031), Cholame (3512063), Cholame Valley (3512073), Clifton Court Forebay (3712175), Coal Oil Canyon (3511911), Cuyama (3411985), Delano West (3511973), Denverton (3812128), Domengine Ranch (3612033), East Elk Hills (3511934), Elkhorn Hills (3511915), Guijarral Hills (3612022), Gustine (3712038), Hacienda Ranch (3511975), Holland Canyon (3512052), Kettleman Plain (3512081), Laguna Seca Ranch (3612077), Livermore (3712167), Lokern (3511945), Lost Hills (3511956), Lost Hills NE (3511965), Mouth of Kern (3511923), New Cuyama (3411986), Orchard Peak (3512062), Ortigalita Peak NW (3612088), Painted Rock (3511927), Reward (3511936), Ripon (3712162), Sawtooth Ridge (3512061), Semitropic (3511955), Simmler (3511938), Stevinson (3712037), Taft (3511924), Tumey Hills (3612056), Tupman (3511933), Turner Ranch (3712026), Vernalis (3712163), Vine Hill (3812211), Wasco NW (3511964), Wells Ranch (3511916), Woodward Island (3712185)

Threat List Data from the CNDDB

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

Notes
Does plant occur in SJQ Co.? Similar to A. cordulata and A. vallicola. See Proceedings of the American Academy of Arts and Sciences 9:114 (1874) for original description.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 23 February 2025].