Corylus americana (American hazelnut)

Plate 1 figs. a–g

Corylus americana, photographed by Lynn Harper — fig. a Lynn Harper, CC0 1.0 / 2022-05-24 / obs. 200308486

Corylus americana, photographed by Carol Ann Vermeer — fig. b Carol Ann Vermeer, CC BY 4.0 / obs. 205438248

Corylus americana, photographed by jyoung2399 — fig. d jyoung2399, CC BY 4.0 / obs. 187074844

Corylus americana, photographed by Mike Gooley — fig. g Mike Gooley, CC0 1.0 / obs. 186317533

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.

Hamamelis virginianacalled this one 3x compare

Flowering n = 609 observations

272

185

Flowering observations of Corylus americana by month
Month	Observations
Jan	9
Feb	79
Mar	272
Apr	185
May	21
Jun	6
Jul	12
Aug	8
Sep	6
Oct	5
Nov	3
Dec	3

Peak flowering in Mar, from 609 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 17 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.

Corylus americana f. americana
Corylus americana f. calyculata (Dippel) Schelle
Corylus americana f. humilis (Willd.) Schelle
Corylus americana f. missouriensis (A.DC.) Fernald
Corylus americana var. altior Farw.
Corylus americana var. americana
Corylus americana var. calyculata (Dippel) H.J.P.Winkl.
Corylus americana var. humilis (Willd.) Dippel
Corylus americana var. indehiscens Palmer & Steyerm.
Corylus americana var. missouriensis A.DC.
Corylus calyculata Dippel
Corylus humilis Willd.
Corylus serotina G.Kirchn.
Corylus serotina hort. ex Dippel
Corylus virginiana Münchh.
Corylus virginiana hort. ex Dippel
Rostella variegata Dochnahl

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
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.