Data sources

Each value Trefle shows for Oenothera macrocarpa, 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 recorded9 Not on the record2 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	Nutt.	No source recorded	Source not recorded
Bibliography	Cat. Pl. Upper Louisiana: n.° 56 (1813)	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	1813	No source recorded	Source not recorded
Descriptive
Common name	Bigfruit evening primrose	No source recorded	Source not recorded
Observations	C. & EC. U.S.A. to Mexico (Coahuila)	No source recorded	Source not recorded
Morphology
Average height	6 cm	6.2 cm · TRY Plant Trait Database · Measured · 15 observations · 2026-10-09 TRY 7.0 datasets 415, 500, 564	Differs from sources
Biological type	empty	chamaephyte · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 500	Not on the record
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
Bloom months	may	may · TRY Plant Trait Database · Measured · 53 observations · 2026-10-09 TRY 7.0 datasets 163, 415	Sourced
Usda legacy
C n ratio	empty	29.8 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 412, 415	Not on the record

Oenothera macrocarpa Nutt., 1813 14% complete

Bigfruit evening primrose

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

Data sources