Data sources

Each value Trefle shows for Polygonum aviculare, 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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Sourced18 Differs from sources3 Source not recorded8 Not on the record6 Sources: TRY Plant Trait Database, Earlier Trefle data, POWO / WCVP (Kew)

Field	Shown	What the sources say
Core
Author	L.	No source recorded	Source not recorded
Bibliography	Sp. Pl.: 362 (1753)	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	1753	1986 · POWO / WCVP (Kew) · Reported · 2026-10-11	Differs from sources
Descriptive
Common name	Prostrate knotweed	No source recorded	Source not recorded
Observations	Temp. Northern Hemisphere, Macaronesia to Eritrea	No source recorded	Source not recorded
Morphology
Average height	23 cm	22.95 cm · TRY Plant Trait Database · Measured · 176 observations · 2026-10-09 TRY 7.0 datasets 25, 28, 86, 164, 174, 178, 193, 203, 251, 299, 468, 500, 655, 716, 818, 863, 897, 926	Differs from sources
Biological type	therophyte	therophyte · TRY Plant Trait Database · Measured · 16 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 203, 500, 655, 918	Sourced
Flower color	green, magenta	green, magenta · TRY Plant Trait Database · Measured · 3 observations · 2026-10-20 TRY 7.0 datasets 4, 655 1 earlier or rejected value Superseded green, magenta · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 4, 655	Sourced
Foliage color	green	green · TRY Plant Trait Database · Measured · 8 observations · 2026-10-20 TRY 7.0 datasets 443, 879 1 earlier or rejected value Superseded green · TRY Plant Trait Database · Measured · 8 observations · 2026-10-09 TRY 7.0 datasets 443, 879	Sourced
Foliage texture	fine	fine · TRY Plant Trait Database · Measured · 4 observations · 2026-10-20 TRY 7.0 datasets 4, 71, 443, 879 1 earlier or rejected value Superseded fine · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 443, 879	Sourced
Fruit color	brown	brown · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 882 1 earlier or rejected value Superseded brown · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 882	Sourced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 · 4 observations · 2026-10-20 TRY 7.0 datasets 4, 882 1 earlier or rejected value Superseded nut · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 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	45 cm	45 cm · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 25, 28, 86, 164, 174, 178, 193, 203, 251, 299, 468, 500, 655, 716, 818, 863, 897, 926	Sourced
Sexuality	empty	hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 4 1 earlier or rejected value Superseded hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 4	Not on the record
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	may, jun, jul	may, jun, jul · TRY Plant Trait Database · Measured · 6 observations · 2026-10-20 TRY 7.0 datasets 4, 163, 174, 203 1 earlier or rejected value Superseded feb, may, jun · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09 TRY 7.0 datasets 4, 163, 174, 203	Sourced
Duration	annual, perennial	annual, perennial · TRY Plant Trait Database · Measured · 31 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 28, 71, 86, 110, 164, 175, 178, 193, 203, 236, 299, 443, 818, 879, 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
Ground humidity	5 / 12 · fresh, never flooded (mesohydric)	5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 178, 203 1 earlier or rejected value Superseded 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 203	Sourced
Light	7 / 9 · half-light to light	7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 178 1 earlier or rejected value Superseded 7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 178	Sourced
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 10 observations · 2026-10-20 TRY 7.0 datasets 20, 57, 71, 193, 444, 445, 882 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 9 observations · 2026-10-09 TRY 7.0 datasets 20, 57, 71, 193, 444, 445, 882	Sourced
Ph maximum	pH 6.5	pH 6.5 · 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 5.5	pH 5.5 · 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
Soil nutriments	8 / 9 · very rich (pereutrophic)	7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 178 1 earlier or rejected value Superseded 7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178	Differs from sources
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 3 observations · 2026-10-20 TRY 7.0 datasets 178, 242 1 earlier or rejected value Superseded 0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Sourced
Cultivation
Minimum root depth	13 cm	13 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-20 TRY 7.0 datasets 818, 898 1 earlier or rejected value Superseded 13 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 818, 898	Sourced
Usda legacy
C n ratio	empty	17.5 · TRY Plant Trait Database · Measured · 5 observations · 2026-10-20 TRY 7.0 datasets 193, 412 1 earlier or rejected value Superseded 17.5 · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 193, 412	Not on the record
Other
Propagation method	—	seed · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 174 1 earlier or rejected value Superseded seed · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 4 observations · 2026-10-20 TRY 7.0 datasets 174 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Soil ph indicator	—	6 · TRY Plant Trait Database · Measured · 5 observations · 2026-10-20 TRY 7.0 datasets 178, 203, 489 1 earlier or rejected value Superseded 6 · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 178, 203, 489	Not on the record
Temperature indicator	—	6 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 242 1 earlier or rejected value Superseded 6 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 242	Not on the record

Polygonum aviculare L., 1753 50% complete

Prostrate knotweed

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Data sources