Japanese nut slice

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Japanese nut slice
Japanese nut slice (Torreya nucifera)

Japanese nut slice ( Torreya nucifera )

Subdivision : Seed plants (Spermatophytina)
Class : Coniferopsida
Order : Conifers (Coniferales)
Family : Yew family (Taxaceae)
Genre : Nut slices ( Torreya )
Type : Japanese nut slice
Scientific name
Torreya nucifera
( L. ) Sieve. & Zucc.

The Torreya nucifera ( Torreya nucifera ) is a plant from the genus of Torreya ( Torreya ) in the family of yew plants (Taxaceae).


Trunk with bark

Vegetative characteristics

Torreya nucifera is a slow growing, evergreen tree . The Japanese nut slice reaches heights of 15 to 25 meters and trunk diameters of up to 1.5 meters.

The parallel needles are about 3 centimeters long, dark green at the top with a light green edge and curved downwards. The ground needles have a very unpleasant smell.

Generative characteristics

The Japanese nut slice is single- sexed ( monoecious ) or dioecious ( dioecious ). The narrow seed is about an inch long.

The chromosome number is for Torreya nucifera var. Radicans Nakai 2n = 22.

Occurrences and common names


The Japanese nut slice occurs on the South Korean islands of Wando and Cheju-do and in south-central to southern Japan on the islands of southern Honshu , Kyushu and Shikoku . In Japan this species is called Kaya ( Japanese ).


It was first published in 1753 under the name ( Basionym ) Taxus nucifera by Carl von Linné in Species Plantarum . 1st edition. Volume 2, p. 1040. The new combination to Torreya nucifera (L.) Sieb. & Zucc. took place in 1846 by Philipp Franz von Siebold and Joseph Gerhard Zuccarini in treatises of the mathematical-physical class of the Royal Bavarian Academy of Sciences. Volume 4, No. 3, p. 234. Synonyms for Torreya nucifera (L.) Sieb. & Zucc. are: Caryotaxus nucifera (L.) Henkel et W. Hochst. , Foetataxus nucifera (L.) Nelson , Podocarpus nucifer Loudon , Taxodium nuciferum (L.) Brongn. ex Voigt , Tumion nuciferum (L.) Greene , Torreya ascendens Nakai ex Uyeki , Torreya fruticosa Nakai , Torreya igaensis Doi et Morikawa , Torreya macrosperma Miyoshi , Torreya anda Miyoshi , Torreya nucifera var. articulata Miyoshi , Torreya nucifera var. radicans Nakai .


Due to its slow growth, the wood of the Japanese nut slice is very hard and has a special sound, fine grain and color. That is why it is used in Japan to make Go game boards .

The seeds are edible and are also used to make cooking oil .


In Japan, Torreya nucifera is under protection. In previous years it was cut down intensively due to its positive properties.

Individual evidence

  1. a b c Christopher J. Earle: Torreya nucifera. In: The Gymnosperm Database. February 28, 2019, accessed April 12, 2019 .
  2. Torreya nucifera at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  3. Torreya nucifera in the IUCN Red List of Threatened Species 2019.1. Listed by: T. Katsuki, D. Luscombe, 2010. Retrieved April 12, 2019.
  4. Torreya nucifera in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved April 12, 2019.
  5. a b Torreya nucifera at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved April 12, 2019.

Web links

Commons : Japanese Nut Slice ( Torreya nucifera )  - Collection of images, videos and audio files