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   Cavicularia
   Cavicularia densa is the only species in the liverwort genus Cavicularia. It is distinguished from Blasia by the absence of a collar around the base of the sporophyte capsule, and a clustered arrangement of sperm-producing antheridia. Cavicularia is endemic to Japan, where it grows on fine soil. Th...
   Found op http://en.wikipedia.org/wiki/Cavicularia
   
   

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