ひもかずら (紐蔓) [Index] [Back] わが国の本州、中部地方以北から北海道、それに南千島やサハリン、朝鮮半島に分布しています。山地の少し湿った岩上や岩の割れ目などに生えます。茎は細くてよく分枝し、地面や岩上を這ってマット状になります。葉は深緑色でやや硬く、茎にらせん状につきます。また葉の辺縁にはまばらに毛があり、先端には白色毛状の付属物があります。胞子嚢穂は側枝の先端につき、胞子嚢は球形です。  イワヒバ科イワヒバ属の常緑シダ類で、学名は Selaginella shakotanensis。英名はありません。  "Himo-kazura" (Selaginella shakotanensis) belongs to Selaginellaceae (the Spikemoss family). It is an evergreen moss that is distributed from the Chubu region of Honshu northward to Hokkaido in Japan, as well as in the southern Kuril Islands, Sakhalin, and the Korean Peninsula. It grows on damp rocks and in crevices in mountainous areas. The stems are thin and well branched, crawling on the ground or rocks and forming mats. The leaves are dark green and somewhat stiff, and are attached to the stem in a spiral shape. The leaf margins are sparsely hairy, and the tips have white hair-like appendages. The sporangia are attached to the tips of the lateral branches, and the sporangia are spherical.  宮城県加美町「薬莱山」にて、2023年04月27日撮影。  Shu Suehiro shu@botanic.jp