Striped spur - Striped spur

Japanese: スジヒトツバ - すじひとつば

An evergreen small fern (illustration) that grows under relatively dry forests in warm mountainous regions. It is classified as a member of the Polypodiaceae family, but some classification systems recognize the monotypic family, Polypodiaceae. The rhizome is short and transverse, and is stiff and densely covered with soft hairs but without scales. The leaves are dimorphic. The vegetative leaves are simple, entire, sometimes bifurcated at the tip, and have long petioles. The blade of the vegetative leaf is broadly ovate-elliptical, 10-20 cm long and 3-10 cm wide, while the blade of the sporophyte leaf is linear-lanceolate, 8-15 cm long and 1-1.5 cm wide, with sporangia on the entire underside except below the midrib, and mixed with hairs.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

暖地の山地の比較的乾いた林下に生じる常緑性の小シダ（イラスト）。ウラボシ科に含まれるが，単型のスジヒトツバ科を認める分類系もある。根茎は短く横走し，硬くて，やわらかい毛を密生するが，鱗片はない。葉は2形。栄養葉は単葉，全縁で，時に先端が2裂することもあり，長い葉柄をつける。栄養葉の葉身は広卵状楕円形，長さ10～20cm，幅3～10cm，胞子葉の葉身は線状披針形，長さ8～15cm，幅1～1.5cm，主脈の下側を除いて裏面全体に胞子囊をつけ，毛が混じる。

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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