Species Details

Atriplex flavida

Carrizo Plain crownscale

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Scientific Name:
Atriplex flavida (S.C. Sand. & G.L. Chu) D.J. Keil & D.W. Taylor
Common Name:
Carrizo Plain crownscale
Family: Chenopodiaceae
Element Code: PDCHE04360
USDA Plants Symbol:
Synonyms/Other Names:
CA Rare Plant Rank: 1B.3
Fed List: None
State List: None
Global Rank: G3
State Rank:
Other Status: SB_SBBG
CRPR Changes:
added to 1B.3 on 2019-11-04
Add Date: 2019-11-04
Date Edited: 2021-06-03
Lifeform: annual herb
Blooming Period: Mar-Jul
585 - 605 meters
1920 - 1985 feet
General Habitat:
  • Chenopod scrub
  • Valley and foothill grassland
  • Vernal pools
General Micro Habitat:
Micro Habitat:
  • Alkaline

Threatened by agricultural development. Possibly threatened by vehicles, grazing, non-native plants, road construction, and foot traffic. Formerly included in A. coronata var. vallicola; differentiated from all A. coronata varieties in having an overall yellow-green color (vs. gray-green), 3(4) stamens (vs. (4)5 stamens), and longer fruiting bracteoles in addition to other characters. See Genera and a New Evolutionary System of World Chenopodiaceae (2017) by Chu and Sanderson for original description, and Phytoneuron 65:1-7 (2018) for taxonomic treatment and revised nomenclature.



Total Occurrences: 37
Element Occurrence Ranks:
5 11 5 1 0 15
Occurrence Status:
Historical >20 Years 11
Recent <=20 Years 26
Presumed Extant 37
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
California Valley (3512031), Chimineas Ranch (3511928), La Panza NE (3512041), Las Yeguas Ranch (3511948), McKittrick Summit (3511937), Painted Rock (3511927), Panorama Hills (3511926), Simmler (3511938)
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.


Presumed Extant
Counties   Quads