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Cryptomeria (literally "hidden parts") is a monotypic genus of conifer in the cypress family Cupressaceae. It includes only one species, Cryptomeria japonica (syn. Cupressus japonica L.f.). It is considered to be endemic to Japan, where it is known as Sugi . [2] The tree is called Japanese cedar [3] or Japanese redwood [4] [5] in English.
Types Of Cryptomeria. Dragon Prince™ Cryptomeria is a compact form of Japanese cedar, Cryptomeria japonica. The species originates in central and southern Japan and China, where it grows as a ...
Cryptomeria stamens and pollen. Hay fever in Japan (花粉症, kafunshō, "pollen illness") is most commonly caused by pollen from Cryptomeria japonica (known as sugi in Japanese and often translated as "cedar" though it is not a member of the Cedrus genus) and Japanese cypress (known as hinoki), two native Japanese tree species.
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Daisugi (台杉) is a Japanese technique related to pollarding, used on Cryptomeria (sugi) trees. [1] [2] [3] The term roughly translates to "platform cedar". [4] When applied in a silviculture context, the daisugi method requires trunks to be pruned every 2–4 years in order to maintain the straight, clear grain that they are coveted for. [5] [6]
On the eastern side facing the Pacific Ocean, important species include Ulmus japonica, Arachniodes standishii , and Laportea macrostachya. This region has been particularly affected by human development and clearing of natural forests. Cleared lands tend to be replanted with Larix kaempferi, Cryptomeria japonica , and Chamaecyparis obtusa. [4]
The pollen of many genera of Cupressaceae is allergenic, causing major hay fever problems in areas where they are abundant, [42] most notably by Cryptomeria japonica (sugi) pollen in Japan. [43] Highly allergenic species of cypress with an OPALS allergy scale rating of 8 out of 10 or higher include: Taxodium , Cupressus , Callitris ...
Yakusugi is the largest Sugi (Cryptomeria japonica) in Yakushima in southwest Japan. Yakusugi (屋久杉) refers to "Japanese cedar" (sugi, or Cryptomeria) on the island of Yakushima, typically growing at altitudes 500 meters and higher. The term also extends to the lumber taken from the logging of these coniferous trees.
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