Charles C. P. Hobkirk, A Synopsis of the British Mosses
“ Stems robust, with numerous radicles. L. erecto-patent, straight, rigid, from a somewhat contracted linear base, lanceolate, longly subulate, suddenly narrowed at one-third their length; margin involute above, apex acute, with a few minute denticulations. Nerve two-thirds width of base. Cells at basal wings enlarged lax reddish brown, exterior rows hyaline, above rectangular, and then rhomboido-elliptic. Leaves falcate when growing in dry places. ”
