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(A) Polytrichum commune Hedw. has an internal vascular system and is one of the tallest mosses (scale bar = 100 mm), yet this species is dwarfed by vascular plants (B and C). (B) Note the height of the surrounding forest in comparison to the Polytrichum bearing sporophytes in the foreground. (C) Hummocks of Polytrichum (most visible in the bottom right of the image) are often invaded and overtopped by tracheophytes, in this case moncots (seen in the top left of the image).
