Juncus effusus var. decipiens; rush

Japanese: イ(藺) - イ（英語表記）Juncus effusus var. decipiens; rush

A perennial plant of the Juncaceae family found in temperate regions of the Northern Hemisphere. It grows in wetlands, grows densely on wiry stems that grow horizontally from underground stems, and can reach a height of up to 1m. It produces a spherical flower at the end, and cylindrical sheath-like bracts grow long at the end of the flower, so it appears as if the flower is growing midway up the flower stalk. The leaves degenerate into brown sheaths at the base of the flower stalk. It is cultivated in paddy fields, and when it reaches about 1.5m in length it is harvested and dried for use in weaving tatami mats and flower mats. It is cultivated widely from Hokkaido to Kyushu and Okinawa, but is mostly produced in the Chugoku region, especially Okayama, Hiroshima and Kumamoto prefectures. In the past, the pith was used as a wick, so it is also known as toushinsou (wick grass), and is also called rush.

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

Japanese:

イグサ科の多年草で北半球の温帯に分布する。湿地に生え，横に伸びる地下茎から針金状の茎を密生し，高さ 1mにも達する。先端に球状の花穂をつけ，円柱形の鞘状の包葉が花穂の先に長く伸びるため，花茎の途中に花穂をつけるようにみえる。葉は退化して褐色の鞘状となり，花茎の基部につく。水田に栽培し，1.5mぐらいになったものを刈取って乾燥し，畳表や花むしろなどの敷物を編むのに用いる。北海道から九州，沖縄まで広範囲に栽培されるが，中国地方，特に岡山，広島両県と熊本県が産額が多い。昔，髄が灯心に用いられたのでトウシンソウ (灯心草) の別名があり，またイグサともいう。

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