Index / Search / Juncus dubius
§1 Plant
Juncus dubius Engelm.
vernacular questionable rush — species · Juncaceae
§2Habit & range
Habit and range
- Growth habit
- Graminoid
- Duration
- Perennial
- Group
- Monocot
- Family
- Juncaceae Juss.
- Genus
- Juncus
§2a
Native status, by region
- L48 Lower 48 States Native
§2b
County-level range
· 22 counties across 1 state§3Cultivation
No cultivation specs.
USDA has not characterised this taxon. Roughly four out of five plants in the database lack the detailed cultivation record present here — typically because they have not been the focus of NRCS Plant Materials work. Range and distribution data are unaffected.
§4Counties, by state
Recorded in 22 counties across 1 state.
California view state ↗ 22 N ▾
- Alpine 06003
- Butte 06007
- Contra Costa 06013
- Fresno 06019
- Inyo 06027
- Kern 06029
- Lassen 06035
- Madera 06039
- Mariposa 06043
- Mendocino 06045
- Merced 06047
- Nevada 06057
- Plumas 06063
- San Diego 06073
- San Luis Obispo 06079
- San Mateo 06081
- Santa Clara 06085
- Shasta 06089
- Sonoma 06097
- Tehama 06103
- Tulare 06107
- Tuolumne 06109
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/JUDU ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/2701996 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z