Species Details

Juncus leiospermus var. leiospermus

Red Bluff dwarf rush

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Photo of Juncus leiospermus var. leiospermus
©2016 Dylan Neubauer
Photo of Juncus leiospermus var. leiospermus
©2008 John Dittes
Scientific Name:
Juncus leiospermus F.J. Herm. var. leiospermus
Common Name:
Red Bluff dwarf rush
Family: Juncaceae
Element Code: PMJUN011L2
USDA Plants Symbol: JULEL
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Mar-Jun
35 - 1250 meters
115 - 4100 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
  • Meadows and seeps
  • Valley and foothill grassland
  • Vernal pools
General Micro Habitat:
Micro Habitat:
  • Vernally Mesic

Threatened by development, grazing, vehicles, industrial forestry, and agriculture.

Total Occurrences: 62
Element Occurrence Ranks:
7 18 8 3 4 22
Occurrence Status:
Historical >20 Years 34
Recent <=20 Years 28
Presumed Extant 58
Possibly Extirpated 3
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Butte (BUT), Placer (PLA), Shasta (SHA), Tehama (TEH)
Quads: Name (Quad Code)
Balls Ferry (4012242), Bend (4012232), Black Butte Dam (3912273), Blossom (4012224), Burney (4012186), Burney Falls (4112116), Burney Mtn. West (4012176), Campbell Mound (3912187), Cherokee (3912165), Cottonwood (4012243), Enterprise (4012253), Henleyville (3912283), Olinda (4012244), Oroville (3912155), Palo Cedro (4012252), Project City (4012263), Red Bluff East (4012222), Red Bluff West (4012223), Richardson Springs (3912177), Roseville (3812173), Shippee (3912156), Tuscan Buttes Ne (4012241), West of Gerber (4012213)
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
Original Description: Leaflets of Western Botany 5:113 (1948)
Taxonomic Treatment: Memoirs of the New York Botanical Garden 39:46-51 (1986)
Species Account: Juncus leiospermus var. leiospermus profile for potential Species of Conservation Concern evaluation (2018)