walking fern Carptosorus rhizophyllus过山蕨
Siberian walking fern马蹬草
sibirica walking fern herb马蹬草
N（名词） a North American fern, Camptosorus rhizophyllus, having sword-shaped fronds, the tips of which take root when in contact with the ground: family Aspleniaceae 根叶过山蕨