noun
green penny fern
A small epiphytic fern (Lemmaphyllum microphyllum) native to East Asia, often found growing on rocks or tree trunks.
マメヅタは岩の上にびっしり生えていた。
Green penny ferns were growing thickly on the rock.
The name マメヅタ (豆蔦) literally means 'bean ivy', referring to the small, bean-like leaves and its creeping habit. The exact origin is uncertain.