Data sources

Each value Trefle shows for Nasturtium officinale, 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

Field	Shown	What the sources say
Core
Author	W.T.Aiton	No source recorded	Source not recorded
Bibliography	Hortus kew. ed. 2, 4:110. 1812	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	1812	No source recorded	Source not recorded
Descriptive
Common name	Watercress	No source recorded	Source not recorded
Observations	Europe to C. Asia and Arabian Pen., Macaronesia, N. & NE. Trop. Africa	No source recorded	Source not recorded
Morphology
Average height	40 cm	40 cm · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09 TRY 7.0 datasets 25, 28, 116, 174, 178, 251, 500, 882, 918	Sourced
Biological type	hydrophyte	hydrophyte · TRY Plant Trait Database · Measured · 7 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 174, 178, 500, 918	Sourced
Flower color	white, green	white · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 4, 882	Differs from sources
Flower conspicuous	true	true · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Foliage texture	coarse	fine · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4, 71	Differs from sources
Fruit shape	silique	silique · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 4, 882	Sourced
Growth form	Multiple Stem	Multiple Stem · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	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
Growth rate	Moderate	Moderate · 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 · 4 observations · 2026-10-09 TRY 7.0 datasets 25, 28, 116, 174, 178, 251, 500, 882, 918	Sourced
Sexuality	empty	hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 4	Not on the record
Vegetable	true	true · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Phenology
Bloom months	may, jun	may, jun · TRY Plant Trait Database · Measured · 4 observations · 2026-10-20 TRY 7.0 datasets 4, 163, 174 1 earlier or rejected value Superseded jan, may, jun · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 163, 174	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 15 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 178, 882, 918	Sourced
Ecology
Atmospheric humidity	9 / 9 · saturated air	9 / 9 · saturated air · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ground humidity	10 / 12 · amphibious all year, base always under water (permanent helophyte)	10 / 12 · amphibious all year, base always under water (permanent helophyte) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Sourced
Light	7 / 9 · half-light to light	7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 169, 178	Sourced
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 71, 445	Sourced
Ph maximum	pH 8	pH 8 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 6.4	pH 6.4 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Soil nutriments	6 / 9 · rather rich (meso-eutrophic)	7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 169, 178	Differs from sources
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 178, 242, 489	Sourced
Usda legacy
C n ratio	empty	5.8 · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 229, 412	Not on the record
Other
Propagation method	—	seed, vegetative · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 12 observations · 2026-10-09 TRY 7.0 datasets 174	Not on the record
Soil ph indicator	—	7 · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Not on the record
Temperature indicator	—	5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 489	Not on the record

Nasturtium officinale W.T.Aiton, 1812 45% complete

Watercress

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Data sources