wall fern
wall-fern的词性:n.(名词)
1. A low-growing Eurasian fern (Polypodium vulgare) characterized by creeping stems that form dense mats. 水龙骨:一种长得很矮的欧亚大陆蕨类植物,(多足蕨 多足蕨属) ,以具有能够形成厚密的大片茎叶的蔓生茎为特征