Fissidens cylindraceus Mitten 1869

Fissidens cylindraceus Mitt. Jour. I^inn. Soc
12: 590. 1869.
Stems apparently erect, up to 7 mm. long, branching apparently by innovations; leaves typically not overlapping except at or near the top of the stem, contorted when dry, up to 1.6 X 0.4 mm., oblong, acute, the margias plane, unbordered, finely and evenly crenulate throughout by projecting cell-angles, the costa usually ending 2-3 cells below the leaf-apex; vaginant laminae tmequal, about half the length of the leaf; dorsal lamina about one-third the width of the leaf at base, abruptly roimded off; leaf-cells minute, 5-7 ^ in diameter, irregular in size and shape, mamillose with a single bltmt papilla, obscure; antheridial buds in the axils of the stem-leaves; setae terminal, sometimes 2 or 3 from a single perichaetium, about 1.5 mm. long; capsules erect and symmetric, subcylindric, attenuate into a short neck, the urn about 1 X 0.3 mm., dark red-brown when ripe (in the type), the exothecial cells rectangular, not collenchymatous ; calyptra cucullate; operculum short-rostrate; peristome-teeth up to 0.24 mm., divided to the base into 2 slender forks, papillose.
Type locality: Mt. Chimborazo, 3000 ft. {Spruce 475b).
Distribution: Orizaba, Mexico {MurriU); Martinique {Duss 282) Puerto Rico {Steere 5305,