Species Details

Puccinellia simplex

California alkali grass

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Scientific Name:
Puccinellia simplex Scribn.
Common Name:
California alkali grass
Family: Poaceae
Element Code: PMPOA53110
USDA Plants Symbol: PUSI
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G2
State Rank:
Other Status: BLM_S
CRPR Changes:
added to 1B.2 on 2015-10-15
Add Date: 2015-10-15
Date Edited: 2022-08-02
Lifeform: annual herb
Blooming Period: Mar-May
2 - 930 meters
5 - 3050 feet
General Habitat:
  • Chenopod scrub
  • Meadows and seeps
  • Valley and foothill grassland
  • Vernal pools
General Micro Habitat: sinks
Micro Habitat:
  • Alkaline
  • Flats
  • Lake Margins
  • Vernally Mesic
Threatened by hydrological alterations, urbanization, agricultural conversion, development, and habitat fragmentation, disturbance, alteration, and loss; resulting in extirpation of some occurrences. Potentially threatened by solar energy development. Possibly threatened by grazing and proximity to roads. Similar to P. parishii. See Circular, United States Department of Agriculture, Division of Agrostology 16:1 (1899) for original description.
Total Occurrences: 80
Element Occurrence Ranks:
4 3 2 0 15 56
Occurrence Status:
Historical >20 Years 58
Recent <=20 Years 22
Presumed Extant 65
Possibly Extirpated 10
Presumed Extirpated 5
California Endemic:
California Island:
States: Name (Code)
California (CA), Utah (UT)
California Counties and Islands: Name (Code)
Alameda (ALA), Butte (BUT), Colusa (COL), Contra Costa (CCA), Fresno (FRE), Glenn (GLE), Kern (KRN), Kings (KNG)*, Lake (LAK), Los Angeles (LAX), Madera (MAD), Merced (MER), Napa (NAP), San Bernardino (SBD), San Luis Obispo (SLO), Santa Clara (SCL), Santa Cruz (SCR), Solano (SOL), Stanislaus (STA), Tulare (TUL), Yolo (YOL)
Quads: Name (Quad Code)
Altamont (3712166), Arbuckle (3912211), Arena (3712036), Bonita Ranch (3612082), Byron Hot Springs (3712176), Cairns Corner (3611922), Calistoga (3812255), Chittenden (3612185), Cholame Valley (3512073), Clifton Court Forebay (3712175), Colusa (3912221), Crevison Peak (3712122), Crows Landing (3712141), Davis (3812156), Denverton (3812128), Dozier (3812137), Eldorado Bend (3812177), Elmira (3812138), Fairfield South (3812221), Firebaugh NE (3612083), Goshen (3611934), Gravelly Ford (3612072), Grays Bend (3812166), Guernsey (3611926), Hanford (3611936), Hatch (3712048), Helm (3612051)*, Jamesan (3612062), Kerman (3612061)*, La Costa Valley (3712157), Lake Isabella North (3511864), Lake Isabella South (3511854), Logandale (3912242), Lokern (3511945), Los Banos (3712017), Los Banos Valley (3612181), Lost Hills (3511956), Lost Hills NE (3511965), Lucerne Valley (3411648), Madison (3812168), Merritt (3812157)*, Milpitas (3712148), Monson (3611943), Mud Hills (3511711), Ortigalita Peak NW (3612088), Pennington (3912137), Plainsburg (3712023), Redman (3411778), Remnoy (3611935)*, Reward (3511936), Ripon (3712162), Riverdale (3611947), Rosamond Lake (3411871), Saxon (3812146)*, Stonyford (3912245), Stratford (3611927), Tassajara (3712177), Taylor Weir (3611914), Traver (3611944), Weed Patch (3511828)*, West Elk Hills (3511935), Westley (3712152), Wilbur Springs (3912214), Williams (3912222), Woodland (3812167)*
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