Polytrichales

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Polytrichales (subclass Bryidae) An order of acrocarpous mosses which may in some species be quite large (e.g. up to 40 cm); the stems are tough, and show some internal differentiation. The leaves have characteristic longitudinal plates or lamellae on the upper surface along the nerve; the leaf bases often sheath the stem. Species are found on the ground in woods, on heathland, etc.