Data sources

Each value Trefle shows for Helianthus petiolaris, 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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Sourced4 Source not recorded9 Not on the record1 Sources: TRY Plant Trait Database

Field	Shown	What the sources say
Core
Author	Nutt.	No source recorded	Source not recorded
Bibliography	J. Acad. Nat. Sci. Philadelphia 2: 115 (1821)	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	1821	No source recorded	Source not recorded
Descriptive
Common name	Plains sunflower	No source recorded	Source not recorded
Family common name	Aster family	No source recorded	Source not recorded
Observations	Canada to N. Mexico	No source recorded	Source not recorded
Morphology
Average height	210 cm	210 cm · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 28, 818	Sourced
Biological type	hemicryptophyte	hemicryptophyte · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 918	Sourced
Phenology
Duration	annual	annual · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 28, 818	Sourced
Ecology
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 67, 444	Sourced
Cultivation
Minimum root depth	empty	45 cm · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 818	Not on the record

Helianthus petiolaris Nutt., 1821 16% complete

Plains sunflower

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

Data sources