Data sources

Each value Trefle shows for Persicaria lapathifolia, 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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Sourced17 Differs from sources2 Source not recorded9 Not on the record4 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	(L.) Delarbre	No source recorded	Source not recorded
Bibliography	Fl. Auvergne, ed. 2: 519 (1800)	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	1800	No source recorded	Source not recorded
Descriptive
Common name	Pale knotweed	No source recorded	Source not recorded
Observations	Subarctic & Temp. Northern Hemisphere to W. & C. Malesia, N. Africa to Ethiopia	No source recorded	Source not recorded
Morphology
Average height	69 cm	68.75 cm · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09 TRY 7.0 datasets 71, 116, 178, 299, 500, 882, 918	Differs from sources
Biological type	therophyte	therophyte · TRY Plant Trait Database · Measured · 20 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 174, 178, 350, 500, 882, 918	Sourced
Flower color	white, green, magenta	green, magenta, white · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09 TRY 7.0 datasets 4, 350	Sourced
Foliage texture	medium	medium · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4	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 · 7 observations · 2026-10-09 TRY 7.0 datasets 4, 350, 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 · 5 observations · 2026-10-09 TRY 7.0 datasets 71, 116, 178, 299, 500, 882, 918	Sourced
Sexuality	hermaphrodite	hermaphrodite · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	jun, jul	jun, jul · TRY Plant Trait Database · Measured · 9 observations · 2026-10-20 TRY 7.0 datasets 4, 163, 174 1 earlier or rejected value Superseded feb, jun, jul · TRY Plant Trait Database · Measured · 9 observations · 2026-10-09 TRY 7.0 datasets 4, 163, 174	Sourced
Duration	annual, biennial, perennial	annual, biennial, perennial · TRY Plant Trait Database · Measured · 12 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 178, 299, 882, 918	Sourced
Fruit months	empty	jan, feb, mar, apr, may, dec · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 882	Not on the record
Ecology
Atmospheric humidity	8 / 9 · very humid air	8 / 9 · very humid air · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ground humidity	7 / 12 · wet, flooded a few weeks a year (hygrophilous)	7 / 12 · wet, flooded a few weeks a year (hygrophilous) · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Light	7 / 9 · half-light to light	6 / 9 · half-shade to half-light · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Differs from sources
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 9 observations · 2026-10-09 TRY 7.0 datasets 71, 445, 882	Sourced
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	8 / 9 · very rich (pereutrophic)	8 / 9 · very rich (pereutrophic) · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Sourced
Other
Propagation method	—	seed · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 15 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Soil ph indicator	—	6 · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Not on the record

Persicaria lapathifolia (L.) Delarbre, 1800 47% complete

Pale knotweed

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Data sources