Kouyawarabi - Kouyawarabi

Japanese: コウヤワラビ - こうやわらび

A fern of the Melastomataceae family (illustration), characterized by its strikingly dimorphic leaves. It grows in moist areas of fields, mountains, and riverbanks. The rhizome runs long and horizontally, with leaves rather sparsely borne. The vegetative and sporophylls show striking dimorphism. The vegetative leaves are 30-60 cm long, with petioles longer than the blades and sparsely borne pale brown ovate scales on the lower part. The leaf blade is broadly ovate or triangular-elliptical, divided once into pinnate parts, with the pinnae flowing away above the mid-axis to form broad wings. The pinnae have wavy, bluntly serrated edges. The veins are reticulate.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

著しい2形をした葉が特徴的なメシダ科のシダ（イラスト）。原野･山野･川岸の湿った所に生える。根茎は長く横走し，葉をややまばらにつける。栄養葉と胞子葉は著しい2形を示す。栄養葉は全長30～60cm，葉柄は葉身よりも長く，下部に淡褐色卵形の鱗片をまばらにつける。葉身は広卵形または三角状楕円形，1回羽状に分裂し，中軸の上部では羽片が流れて幅の広い翼となる。羽片は波形の鈍い鋸歯縁となる。葉脈は網状脈である。

出典　株式会社平凡社世界大百科事典第２版について　情報

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