单词 | adder's-tongue fern |
释义 | adder's-tongue fern n. Any of various ferns in the genus Ophioglossum, having an erect stem that branches into a single oval blade and a spikelike spore-bearing stalk.Also called adder's-tongue. [From the resemblance of the spike at the base of the frond to a snake's tongue.] ![]() southern adder's-tongue fern Ophioglossum vulgatum |
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