Data sources

Each value Trefle shows for Helianthus hirsutus, 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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Sourced3 Differs from sources1 Source not recorded11 Not on the record1 Sources: TRY Plant Trait Database

Field	Shown	What the sources say
Core
Author	Raf.	No source recorded	Source not recorded
Bibliography	Ann. Nat.: 14 (1820)	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	1820	No source recorded	Source not recorded
Descriptive
Common name	Hairy sunflower	No source recorded	Source not recorded
Family common name	Aster family	No source recorded	Source not recorded
Observations	SE. Canada to Mexico (Coahuila, Nuevo León)	No source recorded	Source not recorded
Morphology
Average height	47 cm	46.95 cm · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 66, 415	Differs from sources
Growth habit	Forb/herb	No source recorded	Source not recorded
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	jun, jul	jun, jul · TRY Plant Trait Database · Measured · 54 observations · 2026-10-09 TRY 7.0 datasets 66, 163, 415	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09 TRY 7.0 datasets 66, 925	Sourced
Ecology
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 66, 444	Sourced
Usda legacy
C n ratio	empty	23.4 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 412, 415	Not on the record

Helianthus hirsutus Raf., 1820 20% complete

Hairy sunflower

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

Data sources