Gleicheniaceae - Gleicheniaceae

Japanese: ウラジロ科 - ウラジロか（英語表記）Gleicheniaceae

A family of ferns in the order Fern. Widely distributed in tropical and subtropical regions around the world, but especially common in the Southern Hemisphere. Contains about 130 species in about 4 genera. They grow above ground, with long rhizomes bearing shoots, hairs, and scales. The leaves are pinnately compound, with a variety of branching patterns, as the midrachis and rachis stop growing at different positions depending on the species. The veins are free. The sporangia are located on the dorsal side of the veins and consist of several large sporangia. There is no capsule. The sporangia are completely annular and ripen to split longitudinally. The spores are tetrahedral or bilaterally symmetrical.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

シダ植物シダ目の1科。世界中の熱帯，亜熱帯に広く分布するが，特に南半球に多い。約4属 130種ほどを含む。地上生で，根茎は長くはい，毛，鱗片がある。葉は羽状複葉で，中軸や羽軸が種によってさまざまな位置で生長をやめるので，多様な分岐型がみられる。葉脈は遊離。胞子嚢群は葉脈の背側につき，数個の大型の胞子嚢からなる。包膜はない。胞子嚢は完全環帯，熟して縦裂する。胞子は四面体または左右相称である。

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