chain fern

chain-fern的词性：
n.（名词）

1. Any of various terrestrial ferns of the genus Woodwardia, native chiefly to the Northern Hemisphere, having pinnately compound or divided leaves that when fertile bear chainlike rows of spore cases.
链蕨：一种狗脊蕨属 陆生蕨类植物，原主要产于北半球，具有羽状复叶或全裂叶， 繁殖时叶子能长出一排排链状的孢子囊