Data sources

Each value Trefle shows for Polygonum bellardii, with what every source says about it. When sources disagree, the strongest source is shown (how sources are ranked). Values imported before sources were recorded one by one are marked Source not recorded.

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Sourced14 Differs from sources1 Source not recorded9 Not on the record1 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	All.	No source recorded	Source not recorded
Bibliography	Fl. Pedem. 2: 205 (1785)	No source recorded	Source not recorded
Phylum	Tracheophyta	No source recorded	Source not recorded
Rank	species	No source recorded	Source not recorded
Status	accepted	No source recorded	Source not recorded
Year	1785	No source recorded	Source not recorded
Descriptive
Common name	Narrowleaf knotweed	No source recorded	Source not recorded
Observations	Madeira, Medit. to Siberia and Iran	No source recorded	Source not recorded
Morphology
Average height	45 cm	45 cm · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 164, 882, 918	Sourced
Biological type	therophyte	therophyte · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 164, 918	Sourced
Flower color	green	green · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Fruit color	brown	brown · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 882	Sourced
Fruit shape	nut	nut · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 882	Sourced
Growth habit	Forb/herb	Forb/herb · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Maximum height	100 cm	100 cm · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 164, 882, 918	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	jun, jul, aug, sep	jun\|jul\|aug\|sep · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Differs from sources
Duration	annual	annual · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 164, 460, 882, 918	Sourced
Ecology
Atmospheric humidity	4 / 9 · moderately dry air	4 / 9 · moderately dry air · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Light	7 / 9 · half-light to light	7 / 9 · half-light to light · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Nitrogen fixation	empty	None · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 71	Not on the record
Ph maximum	pH 7.5	pH 7.5 · Earlier Trefle data · Inferred · 2026-10-19 value present before provenance tracking (2022 import), no source recorded derived from a Baseflor soil reaction class by the 2022 import, a class not a measurement	Sourced
Ph minimum	pH 7	pH 7 · Earlier Trefle data · Inferred · 2026-10-19 value present before provenance tracking (2022 import), no source recorded derived from a Baseflor soil reaction class by the 2022 import, a class not a measurement	Sourced
Soil nutriments	5 / 9 · intermediate (mesotrophic)	5 / 9 · intermediate (mesotrophic) · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced

Polygonum bellardii All., 1785 39% complete

Narrowleaf knotweed

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Data sources