Ulmus americanaL.

American elm

WFO wfo-0000417596 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Ulmus americana, photographed by Carol Ann Vermeer
fig. a Carol Ann Vermeer, CC BY 4.0 / 2022-06-10 / obs. 205058907
Ulmus americana, photographed by Alexis Godin
fig. b Alexis Godin, CC BY 4.0 / obs. 204901286
Ulmus americana, photographed by Doug Suitor
fig. c Doug Suitor, CC BY 4.0 / obs. 203364845
Ulmus americana, photographed by Tom Scavo
fig. d Tom Scavo, CC BY 4.0 / obs. 202908441
Ulmus americana, photographed by Daryl Nolan
fig. e Daryl Nolan, CC0 1.0 / obs. 195822036
Ulmus americana, photographed by Pierre Cartier
fig. f Pierre Cartier, CC0 1.0 / obs. 203187562
Ulmus americana, photographed by rboles
fig. g rboles, CC BY 4.0 / obs. 202063071
Ulmus americana, photographed by Joseph Aubert
fig. h Joseph Aubert, CC BY 4.0 / obs. 198900300

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 = 286 observations

Peak flowering in Apr, from 286 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 23 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.

  • Ulmus alba Raf.
  • Ulmus americana f. alba (Aiton) Fernald
  • Ulmus americana f. americana
  • Ulmus americana f. ascendens A.D.Slavin
  • Ulmus americana f. columnaris Rehder
  • Ulmus americana f. intercedens Fernald
  • Ulmus americana f. laevior Fernald
  • Ulmus americana f. pendula (Aiton) Fernald
  • Ulmus americana f. viridis F.Seym.
  • Ulmus americana var. alba Aiton
  • Ulmus americana var. aspera Chapm.
  • Ulmus americana var. aurea F.L.Temple
  • Ulmus americana var. bartramii Planch.
  • Ulmus americana var. floridana (Chapm.) Little
  • Ulmus americana var. glabra Planch.
  • Ulmus americana var. incisa Loudon
  • Ulmus americana var. pendula Aiton
  • Ulmus americana var. scabra Spach
  • Ulmus dentata Raf.
  • Ulmus floridana Chapm.
  • Ulmus fulva unranked pendula Meehan
  • Ulmus mollifolia Marshall
  • Ulmus obovata Raf.

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.