Castanopsis cuspidata - Castanopsis cuspidata

Japanese: シイ(椎) - シイ（英語表記）Castanopsis cuspidata

An evergreen tall tree of the Fagaceae family, it is a representative species of evergreen broad-leaved forest in warm regions of Japan. It is also often planted as a garden or park tree. It grows to a height of 10-20m, with branches spreading out in all directions to create a large crown. It has thick, leathery leaves that grow alternately and rather densely. It is monoecious, blooming in May and June. The male flowers produce long inflorescences (catkins) about 10cm long with numerous conspicuous pale yellow stamens. Several female flowers grow in short inflorescences in the lower leaf axils. The pistils have three styles. In autumn, it produces elongated, acorn-like nuts that are edible. Two varieties are sometimes distinguished: C. cuspidata var. sieboldii , which has elliptical leaves 5-6 cm long and produces elongated cylindrical nuts, and C. cuspidata var. cuspidata , which has small leaves (2-4 cm long) and produces nearly spherical nuts about 1 cm in diameter.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ブナ科の常緑高木で，日本の暖地の照葉樹林を構成する代表的な樹種である。また庭木や公園樹としてもよく植えられている。高さ 10～20mとなり，四方に枝を張って大きな樹冠をつくる。厚い革質の葉をやや密に互生する。雌雄同株で，5～6月に開花し，雄花は長さ 10cmあまりの長い花穂 (尾状花序) をつくって多数の淡黄色のおしべが目立つ。雌花は数花が短い穂上に並び，下部の葉腋に生じる。めしべには3本の花柱がある。秋，細長いどんぐり状の堅果をつけ，食用にもなる。長さ5～6cmの楕円形の葉をもち，細長い円筒形の堅果をつけるスダジイ C. cuspidata var. sieboldiiと葉が小さく (長さ2～4cm) ，径 1cmほどのほぼ球形の実をつけるツブラジイ (コジイ) C. cuspidata var. cuspidataの2変種に区別することがある。

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