Kuriharan - Kuriharan

An evergreen fern of the Polypodiaceae family. Its leaves grow sparsely from a thick, wiry rhizome. The leaves have long stalks and oblong blades, with pointed leaflets that are dark green in color. The edges are somewhat wavy. The midvein and lateral veins are clearly visible, but the reticulated veins are not. The sporangia are sparsely distributed in one or two rows on either side of the midvein. It is found in warm areas west of the Kanto region, growing within forests. The closely related Microsorium buergerianum is slightly smaller than Microsorium buergerianum, with sporangia scattered all over the underside. N. subhastata has long triangular leaf blades and irregularly scattered sporangia.

[Makoto Nishida]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

ウラボシ科の常緑性シダ。太い針金状の根茎から葉をまばらに出す。葉は長柄をもち、葉身は長楕円(ちょうだえん)形で、先のとがった単葉は、黒ずんだ緑色。縁は多少ともうねる。中脈、側脈がよくみえるが、網状結合する細脈はみえない。胞子嚢(ほうしのう)群は中脈の両側に1～2列にまばらにつく。分布は関東以西の暖地で、林内に生育。近縁のヌカボシクリハランMicrosorium buergerianumは、クリハランよりやや小形で、胞子嚢群は裏面一面に散在。ヤノネシダN. subhastataは葉身は長三角状で、胞子嚢群は不規則に散在する。

［西田　誠］

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