Data sources

Each value Trefle shows for Populus tremula, 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 record6 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	L.	No source recorded	Source not recorded
Bibliography	Sp. Pl.: 1034 (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	No source recorded	Source not recorded
Descriptive
Common name	European aspen	No source recorded	Source not recorded
Observations	Temp. Eurasia, Algeria	No source recorded	Source not recorded
Morphology
Average height	1510 cm	1510 cm · TRY Plant Trait Database · Measured · 335 observations · 2026-10-09 TRY 7.0 datasets 1, 20, 25, 28, 68, 90, 164, 174, 178, 184, 191, 214, 236, 241, 251, 500, 554, 593, 630, 673, 685, 708, 818, 873, 880, 882, 898, 909	Sourced
Biological type	phanerophyte	phanerophyte · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 158, 164, 174, 175, 178, 203, 500, 918	Sourced
Flower color	purple	purple · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 4 1 earlier or rejected value Superseded purple · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4	Sourced
Foliage color	green, grey	green, grey · TRY Plant Trait Database · Measured · 25 observations · 2026-10-20 TRY 7.0 datasets 236, 443, 879 1 earlier or rejected value Superseded green, grey · TRY Plant Trait Database · Measured · 25 observations · 2026-10-09 TRY 7.0 datasets 236, 443, 879	Sourced
Foliage texture	fine	fine · TRY Plant Trait Database · Measured · 8 observations · 2026-10-20 TRY 7.0 datasets 4, 71, 236, 443, 879 1 earlier or rejected value Superseded fine · TRY Plant Trait Database · Measured · 8 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 236, 443, 879	Sourced
Fruit shape	capsule	capsule · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 4, 882 1 earlier or rejected value Superseded capsule · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4, 882	Sourced
Growth habit	Tree	Tree · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Maximum height	2500 cm	2500 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 1, 20, 25, 28, 68, 90, 164, 174, 178, 184, 191, 214, 236, 241, 251, 500, 554, 593, 630, 673, 685, 708, 818, 873, 880, 882, 898, 909	Sourced
Sexuality	dioecious	dioecious · TRY Plant Trait Database · Measured · 8 observations · 2026-10-20 TRY 7.0 datasets 4, 365 1 earlier or rejected value Superseded dioecious · TRY Plant Trait Database · Measured · 8 observations · 2026-10-09 TRY 7.0 datasets 4, 365	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	mar, may	mar, may · TRY Plant Trait Database · Measured · 7 observations · 2026-10-20 TRY 7.0 datasets 4, 45, 174, 203 1 earlier or rejected value Superseded jan, mar, may · TRY Plant Trait Database · Measured · 7 observations · 2026-10-09 TRY 7.0 datasets 4, 45, 174, 203	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 41 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 28, 71, 178, 236, 365, 443, 460, 818, 879, 882, 918	Sourced
Ecology
Atmospheric humidity	5 / 9 · medium air humidity	5 / 9 · medium air humidity · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ground humidity	empty	5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 178 1 earlier or rejected value Superseded 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 178	Not on the record
Light	8 / 9 · light	6 / 9 · half-shade to half-light · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 178, 489 1 earlier or rejected value Superseded 6 / 9 · half-shade to half-light · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Differs from sources
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 34 observations · 2026-10-20 TRY 7.0 datasets 1, 20, 37, 57, 71, 89, 110, 130, 444, 445, 822 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 34 observations · 2026-10-09 TRY 7.0 datasets 1, 20, 37, 57, 71, 89, 110, 130, 444, 445, 822	Sourced
Ph maximum	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
Ph minimum	pH 5	pH 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	5 / 9 · intermediate (mesotrophic)	6 / 9 · rather rich (meso-eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 178, 489 1 earlier or rejected value Superseded 6 / 9 · rather rich (meso-eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	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, 489 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, 489	Sourced
Cultivation
Minimum root depth	165 cm	165 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-20 TRY 7.0 datasets 818 1 earlier or rejected value Superseded 165 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 818	Sourced
Usda legacy
C n ratio	empty	21.5 · TRY Plant Trait Database · Measured · 11 observations · 2026-10-20 TRY 7.0 datasets 90, 105, 300, 412, 554 1 earlier or rejected value Superseded 21.5 · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09 TRY 7.0 datasets 90, 105, 300, 412, 554	Not on the record
Other
Human usage type	—	animal_food, other, timber · TRY Plant Trait Database · Reported · 2 observations · 2026-10-20 TRY 7.0 datasets 68 1 earlier or rejected value Superseded animal_food, other, timber · TRY Plant Trait Database · Reported · 2 observations · 2026-10-09 TRY 7.0 datasets 68	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 4 observations · 2026-10-20 TRY 7.0 datasets 174, 191 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 174, 191	Not on the record
Soil ph indicator	—	5 · TRY Plant Trait Database · Measured · 3 observations · 2026-10-20 TRY 7.0 datasets 178, 203, 489 1 earlier or rejected value Superseded 5 · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 203, 489	Not on the record
Temperature indicator	—	5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 242 1 earlier or rejected value Superseded 5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 242	Not on the record

Populus tremula L., 1753 47% complete

European aspen

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Data sources