Data sources

Each value Trefle shows for Helianthus occidentalis, 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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Sourced2 Differs from sources1 Source not recorded11 Not on the record1 Sources: TRY Plant Trait Database

Field	Shown	What the sources say
Core
Author	Riddell	No source recorded	Source not recorded
Bibliography	W. J. Med. Phys. Sci. 9: 577. 1836 (Suppl. cat. Ohio plants 13. 1836)	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	1836	No source recorded	Source not recorded
Descriptive
Common name	Western sunflower	No source recorded	Source not recorded
Family common name	Aster family	No source recorded	Source not recorded
Observations	NC. & E. U.S.A.	No source recorded	Source not recorded
Morphology
Average height	53 cm	53.4 cm · TRY Plant Trait Database · Measured · 18 observations · 2026-10-09 TRY 7.0 datasets 28, 415, 671, 925	Differs from sources
Growth habit	Forb/herb	No source recorded	Source not recorded
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	jul	jul · TRY Plant Trait Database · Measured · 52 observations · 2026-10-09 TRY 7.0 datasets 415	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 187 observations · 2026-10-09 TRY 7.0 datasets 28, 925	Sourced
Usda legacy
C n ratio	empty	24.1 · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 570	Not on the record

Helianthus occidentalis Riddell, 1836 18% complete

Western sunflower

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

Data sources