Data sources

Each value Trefle shows for Petasites japonicus, 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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Sourced7 Source not recorded10 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	(Siebold & Zucc.) Maxim.	No source recorded	Source not recorded
Bibliography	: 212 (1866)	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	1866	No source recorded	Source not recorded
Descriptive
Common name	Great butterbur	No source recorded	Source not recorded
Family common name	Aster family	No source recorded	Source not recorded
Observations	China to S. Russian Far East and C. & S. Japan	No source recorded	Source not recorded
Morphology
Average height	100 cm	100 cm · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 116, 174, 500	Sourced
Biological type	geophyte	geophyte · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 174, 500	Sourced
Foliage color	green	green · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 443, 879	Sourced
Foliage texture	coarse	coarse · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 443, 879	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
Vegetable	false	No source recorded	Source not recorded
Phenology
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 25, 443, 879	Sourced
Ecology
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 71, 822	Sourced

Petasites japonicus (Siebold & Zucc.) Maxim., 1866 25% complete

Great butterbur

.fa-secondary{opacity:.4} Data sources

Data sources