Mosses and Lichens 



The generic name, compounded of two Greek words: 

 a perforation, and oSwv, a tooth, was suggested by the character 

 of the teeth of one species, Trematodon anibiguum, which often 

 have a cleft or perforation running lengthwise of each tooth. 



Plant. 



T. anibiguum. 

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Plant. 



