Japanese nut slice
|Japanese nut slice|
Japanese nut slice ( Torreya nucifera )
|( L. ) Sieve. & Zucc.|
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.
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 榧 ).
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 .
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.
- Christopher J. Earle: Torreya nucifera. In: The Gymnosperm Database. February 28, 2019, accessed April 12, 2019 .
- Torreya nucifera at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- Torreya nucifera in the IUCN Red List of Threatened Species 2019.1. Listed by: T. Katsuki, D. Luscombe, 2010. Retrieved April 12, 2019.
- 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.
- Torreya nucifera at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved April 12, 2019.