Microsorium buergerianum (Miq.) Ching

Japanese: ヌカボシクリハラン（英語表記）Microsorium buergerianum (Miq.) Ching

An evergreen perennial fern of the Polypodiaceae family found in warm areas west of Chiba Prefecture, usually growing on rocks or tree trunks. The rhizome is thin and densely covered with reddish-brown membranous scales. The leaves are 10-40 cm long and soft and leathery. Small ones are oblong to ovate-lanceolate, but well-grown ones are narrow-lanceolate to linear. The petiole is clear and has narrow wings. The veins are connected in a net shape with irregular free veins. The sporangia are small and circular (the Japanese name nukaboshi means bran-like sporangia), and scattered on the underside of the leaves.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

千葉県以西の暖地に分布し，通常岩上や樹幹に着生するウラボシ科の常緑多年生シダ植物。根茎は細く，赤褐色膜質の鱗片で密におおわれる。葉は長さ10～40cm，やわらかな革質，小さいものでは長楕円形から卵状披針形だが，よく生育したものでは狭披針形から線形に近づく。葉柄は明らかで，狭い翼がつく。葉脈は網状に結合し，不規則な遊離脈がある。胞子囊群は円形で小さく(和名のヌカボシとは糠状の胞子囊の意)，葉の裏に散在する。

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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