フィールド日記
2025.01.14
アマクサシダ
竹林でアマクサシダが見られます。羽片の下側は幅が広いのに対し、羽片の上側は幅が狭く、鳥が羽を広げたような形に見えるのが特徴です。胞子のう群は小羽片の縁につきます。和名は熊本県の天草に由来しますが、関東地方以西の太平洋側に広く分布しています。
"Amakusa-Shida (アマクサシダ)" fern plants are found in the bamboo forest. While the undersides of their pinnae are wide, the upper sides of their pinnae are narrow, so they look like the wings of birds. Their sorus is on the edge of their pinnules. The name comes from the city Amakusa, Kumamoto, but they are widely distributed on the Pacific Ocean side west of the Kanto region.
