Carya illinoinensis(Wangenh.) K.Koch

pecan

WFO wfo-0000588763 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Carya illinoinensis, photographed by Nonbinary-Naturalist
fig. a Nonbinary-Naturalist, CC0 1.0 / 2022-05-05 / obs. 195381408
Carya illinoinensis, photographed by CK2AZ
fig. b CK2AZ, CC BY 4.0 / obs. 203560092
Carya illinoinensis, photographed by Adam Kranz
fig. c Adam Kranz, CC0 1.0 / obs. 184257198
Carya illinoinensis, photographed by Nathan May
fig. d Nathan May, CC BY 4.0 / obs. 174937797
Carya illinoinensis, photographed by Adam Kranz
fig. e Adam Kranz, CC0 1.0 / obs. 191792631
Carya illinoinensis, photographed by kayler09
fig. f kayler09, CC BY 4.0 / obs. 170858933
Carya illinoinensis, photographed by Millie Basden
fig. g Millie Basden, CC BY 4.0 / obs. 163331034
Carya illinoinensis, photographed by Tom Field
fig. h Tom Field, CC BY 4.0 / obs. 169013239

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 113 observations

Peak flowering in Apr, from 113 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 19 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Carya angustifolia Sweet
  • Carya diguetii Dode
  • Carya oliviformis (F.Michx.) Nutt.
  • Carya pecan (Marshall) Engl. & Graebn.
  • Carya pecan (Marshall) Nutt.
  • Carya tetraptera Liebm.
  • Hicoria pecan (Marshall) Britton
  • Hicorius diguetii Standl.
  • Hicorius oliviformis Nutt.
  • Hicorius oliviformis (F.Michx.) Raf.
  • Hicorius pecan Britton
  • Hicorius tetraptera (Liebm.) J.Rzedowski et al.
  • Juglans alba var. pacana Castigl.
  • Juglans angustifolia Aiton
  • Juglans cylindrica Lam.
  • Juglans illinoinensis Wangenh.
  • Juglans oliviformis F.Michx.
  • Juglans pecan Marshall
  • Juglans rubra Gaertn.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.