Dogtooth - Dogtooth

Japanese: イヌガラシ - いぬがらし
Dogtooth - Dogtooth

A perennial plant of the Brassicaceae family (APG classification: Brassicaceae). The entire plant is glabrous. The roots are white and strong. The stems are roughly branched and reach a height of 20-40 cm. The leaves are alternate, oblanceolate or oblong-lanceolate, 6-15 cm long, blunt, with pinnate or irregularly serrated edges. The base narrows to form a petiole, which embraces the stem like an ear. From May to November, the 4-6 cm racemes are borne at the ends of the branches, with spatula-shaped yellow petals 3 mm long and slightly longer than the calyx. The siliques are linear, about 2 cm long, and the style is thick and short. It is a weed that grows in fields and roadsides throughout Japan, and is also distributed in Korea, China, and India. There are about 70 species in this genus worldwide, and 5 species in Japan.

[Junko Kobayashi November 13, 2020]

Dogwood (specimen drawing)
©Kanzo Otawa ">

Dogwood (specimen drawing)


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

アブラナ科(APG分類:アブラナ科)の多年草。全草無毛。根は白く強大。茎は粗く分枝して高さ20~40センチメートル。葉は互生し、倒披針(とうひしん)形または長楕円(ちょうだえん)状披針形で長さ6~15センチメートル、鈍頭で羽裂または不規則な鋸歯(きょし)縁となる。基部は狭まって葉柄状となり、耳状に茎を抱く。5~11月、分枝の先に4~6センチメートルの総状花序をつけ、花弁はへら形黄色で長さ3ミリメートル、萼(がく)よりすこし長い。長角果は線形で長さ約2センチメートル、花柱は太く短い。日本全土の畑や道端に生える雑草で、朝鮮、中国、インドにも分布する。この属は世界に約70種、日本に5種分布する。

[小林純子 2020年11月13日]

イヌガラシ〔標本画〕
©大多和鐘三">

イヌガラシ〔標本画〕


出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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