Species Details

Extriplex joaquinana

San Joaquin spearscale

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Lifeform: annual herb
Blooming Period: Apr-Oct
Elevation:
1 - 835 meters
5 - 2740 feet
General Habitat:
  • Chenopod scrub
  • Meadows and seeps
  • Playas
  • Valley and foothill grassland
General Micro Habitat: alkaline
Micro Habitat:
Notes:
Many occurrences extirpated. Need historical quads for TUL Co. Need quads for MNT Co. Report from SLO Co. (247D) needs verification. Threatened by grazing, agriculture, development, and non-native plants. See Proceedings of the American Academy of Arts and Sciences 9:108 (1874) for original description, Proceedings of the Biological Society of Washington 17:99 (1904) for alternative nomenclature, and Systematic Botany 35(4):839-857 (2010) for revised nomenclature.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 127
Element Occurrence Ranks:
A B C D X U
5 28 25 8 13 48
Occurrence Status:
Historical >20 Years 59
Recent <=20 Years 68
Presence:
Presumed Extant 114
Possibly Extirpated 4
Presumed Extirpated 9
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA), Colusa (COL), Contra Costa (CCA), Fresno (FRE), Glenn (GLE), Merced (MER), Napa (NAP), Sacramento (SAC), San Benito (SBT), San Joaquin (SJQ)*, San Luis Obispo (SLO)?, Solano (SOL), Yolo (YOL)
Quads: Name (Quad Code)
Altamont (3712166), Antioch North (3812117), Antioch South (3712187), Arena (3712036), Brentwood (3712186), Byron Hot Springs (3712176), Ciervo Mtn. (3612045), Clifton Court Forebay (3712175), Colusa (3912221), Cuttings Wharf (3812223), Davis (3812156), Denverton (3812128), Diablo (3712178)*, Dozier (3812137), Dunnigan (3812188)*, Elmira (3812138)*, Fairfield North (3812231), Fairfield South (3812221), Glascock Mtn. (3812283), Grays Bend (3812166), Gustine (3712038), Hepsedam Peak (3612037), Hollister (3612174), Las Trampas Ridge (3712271), Liberty Island (3812136), Livermore (3712167), Logandale (3912242), Manor Slough (3912223), Maxwell (3912232), Merritt (3812157), Milpitas (3712148), Morro Bay North (3512047), Morro Bay South (3512037)?, Napa (3812233), Newark (3712251), Niles (3712158), Oakland West (3712273)*, Rio Vista (3812126)*, Rock Spring Peak (3612048), Salt Canyon (3912213), San Felipe (3612184)*, Saxon (3812146), Sites (3912233), Stockton West (3712183)*, Stonyford (3912245), Tassajara (3712177), Tres Pinos (3612173), Vine Hill (3812211), Walnut Creek (3712281), Wilbur Springs (3912214), Wildwood School (3812281), Williams (3912222), Willows (3912252)*, Woodward Island (3712185)
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.

Map

Presumed Extant
Counties   Quads