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Cryjap.jpg
Scientific classification
Kingdom: Plantae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Cupressaceae
Subfamily: Taxodioideae[1]
Genus: Cryptomeria
Species: C. japonica
Binomial name
Cryptomeria japonica
(L.f.) D.Don

Cryptomeria is a monotypic genus of conifer in the cypress family Cupressaceae formerly belonging to the family Taxodiaceae; it includes only one species, Cryptomeria japonica (syn.: Cupressus japonica L.f.). It is endemic to Japan, where it is known as Sugi (Japanese: 杉). The tree is often called Japanese Cedar in English, though the tree is not related to the cedars (Cedrus). In Darjeeling district and Sikkim in India, where it is one of the most widely growing trees, Cryptomeria japonica is called Dhuppi and is favoured for its light wood, extensively used in house building.

DescrptionEdit

It is a very large evergreen tree, reaching up to 70 m (230 ft) tall and 4 m (13 ft) trunk diameter, with red-brown bark which peels in vertical strips. The leaves are arranged spirally, needle-like, 0.5–1 cm (0.20–0.39 in) long; and the seed cones globular, 1–2 cm (0.39–0.79 in) diameter with about 20–40 scales. It is superficially similar to the related Giant Sequoia (Sequoiadendron giganteum), from which it can be differentiated by the longer leaves (under 0.5 cm in the Giant Sequoia) and smaller cones (4–6 cm in the Giant Sequoia), and the harder bark on the trunk (thick, soft and spongy in Giant Sequoia).

Sugi (and Hinoki) pollen is a major cause of hay fever in Japan.

Sugi has been so long-cultivated in China that it is thought by some to be native there. Forms selected for ornament and timber production long ago in China have been described as a distinct variety Cryptomeria japonica var. sinensis (or even a distinct species, Cryptomeria fortunei), but they do not differ from the full range of variation found in the wild in Japan, and there is no definite evidence the species ever occurred wild in China.


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