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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fagales

Familia: Betulaceae
Subfamilia: Coryloideae
Genus: Ostryopsis

O. davidiana – O. intermedia – O. nobilis

Ostryopsis Decne., Bull. Soc. Bot. France 20: 155 (1873).

Decaisne, J., 1873. Bull. Soc. Bot. France 20: 155
Holstein, N. & M. Weigend. 2016. An annotated checklist and lectotypification of Ostryopsis Decne. (Betulaceae), with notes on the numbering system in the collections of P.J.M. Delavay. Phytotaxa 282(3): 235–238. DOI: 10.11646/phytotaxa.282.3.9


Govaerts, R. et al. 2019. Ostryopsis in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2019 Apr. 26. Reference page.
International Plant Names Index. 2019. Ostryopsis. Published online. Accessed: Apr. 26 2019.
The Plant List 2013. Ostryopsis in The Plant List Version 1.1. Published on the internet. Accessed: 2019 Apr. 26. 2019. Ostryopsis. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Apr. 26.

Vernacular names

Ostryopsis is a small genus of deciduous shrubs belonging to the birch family Betulaceae. The species have no common English name, though hazel-hornbeam has been suggested, reflecting their similarities to the closely related hazels and hop-hornbeams.

The genus is native to China.[1] They are shrubs reaching 3–5 m tall, with alternate, double-toothed hazel-like leaves 2–7 cm long. The flowers are produced in spring, with separate male and female catkins. The fruit form in clusters 3–5 cm long with 6-10 seeds; each seed is a small nut 4–6 mm long, fully enclosed in a sheath-like involucre.[2]

The local people in Northeast China has found hazelnuts of Ostryopsis davidiana and Corylus mandshurica are more delicious than that of common hazels and Asian hazels, and the cuisine "stir-fried huozhenzi" (火榛子) are popular. However, their hazelnuts are far more expensive than common and Asian hazelnuts.


Ostryopsis davidiana Decne. - widespread from Sichuan to Liaoning
Ostryopsis intermedia B.Tian & J.Q.Liu - Yunnan
Ostryopsis nobilis Balf.f. & W.W.Sm. - Sichuan, Yunnan


Kew World Checklist of Selected Plant Families
Flora of China - Ostryopsis

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