Data sources

Each value Trefle shows for Corylus avellana, 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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Sourced16 Differs from sources1 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.: 998 (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 filbert	No source recorded	Source not recorded
Observations	Europe to Caucasus	No source recorded	Source not recorded
Morphology
Average height	710 cm	710 cm · TRY Plant Trait Database · Measured · 93 observations · 2026-10-09 TRY 7.0 datasets 20, 25, 28, 37, 45, 68, 86, 116, 164, 174, 175, 178, 191, 241, 708, 729, 818, 873, 880, 898, 909	Sourced
Biological type	phanerophyte	phanerophyte · TRY Plant Trait Database · Measured · 8 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 500, 918	Sourced
Flower color	yellow	green · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4	Differs from sources
Foliage texture	medium	medium · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4, 71	Sourced
Fruit shape	empty	nut · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 4	Not on the record
Growth habit	Tree, Shrub	Tree, Shrub · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Maximum height	empty	No source recorded 1 earlier or rejected value Rejected 550 cm · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 20, 25, 28, 37, 45, 68, 86, 116, 164, 174, 175, 178, 191, 241, 708, 729, 818, 873, 880, 898, 909 below the average height (710 cm) of the same record	Not on the record
Sexuality	monoecious	monoecious · 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	jan, feb, mar	jan, feb, mar · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 37, 45, 174	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 12 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 28, 37, 71, 86, 178, 460, 818, 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	5 / 12 · fresh, never flooded (mesohydric)	5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Light	5 / 9 · half-shade	5 / 9 · half-shade · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 14 observations · 2026-10-09 TRY 7.0 datasets 20, 37, 57, 71, 89, 444, 445	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	6 / 9 · rather rich (meso-eutrophic)	6 / 9 · rather rich (meso-eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Sourced
Soil salinity	0 / 9 · absent from saline soils	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	60 cm	60 cm · TRY Plant Trait Database · Measured · 7 observations · 2026-10-09 TRY 7.0 datasets 37, 818	Sourced
Other
Human usage type	—	ornamental, timber · TRY Plant Trait Database · Reported · 1 observation · 2026-10-09 TRY 7.0 datasets 68	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Soil ph indicator	—	6 · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Not on the record
Temperature indicator	—	5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 242	Not on the record

Corylus avellana L., 1753 43% complete

European filbert

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Data sources