フィールド日記
2025.02.28
マメヅタ
桜の樹皮上でマメヅタが見られます。シダらしくない丸い葉が特徴の常緑のシダ植物です。胞子をつける葉（胞子葉）は普通の葉（栄養葉）と異なり、細長い形をしています。胞子のう群は反り返った胞子葉の裏面全体に広がっています。
"Mamezuta (マメヅタ)" plants can be found on the cherry blossom tree. They are evergreen fern plants with rounded leaves that don't resemble typical ferns. The leaves that produce spores, known as "fertile fronds", differ from those that don't, called sterile fronds, as the former are long and narrow. The sori covers the back of the fertile fronds.
