adder's-tongue fern

adders-tongue-fern的词性：
n.（名词）

1. Any of various ferns in the genus Ophioglossum, having leaves divided into a simple, sterile blade and a slender, spikelike spore-bearing segment. Also called adder's-tongue
瓶尔小草蕨：多种瓶尔小草属 的蕨类植物中任何一种，叶子分成单一的、雌雄蕊俱无的叶片，具有细长的、穗状的含孢子体节 也作 adder's-tongue

adders-tongue-fern的词源：

2. [From the resemblance of the spike at the base of the frond to a snake's tongue]
[源于其前面基部的穗与蛇之舌相似]