Ostrya virginiana(Mill.) K.Koch

American hophornbeam

WFO wfo-0000261470 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Ostrya virginiana, photographed by Scott
fig. a Scott, CC0 1.0 / 2022-05-22 / obs. 199859705
Ostrya virginiana, photographed by Harold Smith
fig. b Harold Smith, CC BY 4.0 / obs. 200741850
Ostrya virginiana, photographed by Lynn Harper
fig. c Lynn Harper, CC0 1.0 / obs. 199388873
Ostrya virginiana, photographed by Jacob Seidel
fig. d Jacob Seidel, CC0 1.0 / obs. 199144280
Ostrya virginiana, photographed by Henry "Nick" Robertson
fig. e Henry "Nick" Robertson, CC BY-SA 4.0 / obs. 198996827
Ostrya virginiana, photographed by Lynn Harper
fig. f Lynn Harper, CC0 1.0 / obs. 197615075
Ostrya virginiana, photographed by Joseph Aubert
fig. g Joseph Aubert, CC BY 4.0 / obs. 196422610
Ostrya virginiana, photographed by Susan Berry
fig. h Susan Berry, CC0 1.0 / obs. 202510589

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 = 206 observations

Peak flowering in Apr, from 206 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.

  • Carpinus ostrya var. americana Michx.
  • Carpinus triflora Moench
  • Carpinus virginiana Mill.
  • Carpinus virginica Münchh.
  • Ostrya americana F.Michx.
  • Ostrya baileyi Rose
  • Ostrya carpinifolia var. virginica (Münchh.) Fliche
  • Ostrya guatemalensis (H.J.P.Winkl.) Rose
  • Ostrya italica subsp. virginiana (Mill.) H.J.P.Winkl.
  • Ostrya italica var. guatemalensis H.J.P.Winkl.
  • Ostrya mexicana Rose
  • Ostrya ostrya MacMill.
  • Ostrya virginiana f. glandulosa (Spach) J.F.Macbr.
  • Ostrya virginiana subsp. lasia (Fernald) A.E.Murray
  • Ostrya virginiana var. glandulosa (Spach) Sarg.
  • Ostrya virginiana var. guatemalensis (H.J.P.Winkl.) J.F.Macbr.
  • Ostrya virginiana var. lasia Fernald
  • Ostrya virginiana var. virginiana
  • Ostrya virginica (Münchh.) Willd.
  • Ostrya virginica var. glandulosa Spach
  • Ostrya vulgaris var. eglandulosa Spach
  • Ostrya vulgaris var. glandulosa Spach
  • Zugilus virginica 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.