Index / Search / Polygonum bellardii
§1 Plant
Polygonum bellardii All.
vernacular narrowleaf knotweed — species · Polygonaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Annual
- Group
- Dicot
- Family
- Polygonaceae Juss.
- Genus
- Polygonum
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Introduced
County-level range
· 67 counties across 9 states/territories§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 67 counties across 9 states/territories.
District of Columbia view state ↗ 1 I ▾
Idaho view state ↗ 2 I ▾
Illinois view state ↗ 5 I ▾
Indiana view state ↗ 20 I ▾
Massachusetts view state ↗ 9 I ▾
Michigan view state ↗ 1 I ▾
Missouri view state ↗ 1 I ▾
New York view state ↗ 18 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/POBE ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/5334430 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z