1.
Rhabdoweisia crenulata
(Mitten) H. Jameson, Rev. Bryol. 17: 6. 1890.
Didymodon crenulatus
Mitten, J. Proc. Linn. Soc., Bot., suppl. 1: 23. 1859
Plants
0.5-3 cm.
Leaves
lingulate, crisped when dry, 2-4 mm, broadly acute to obtuse, margins irregularly dentate distally, distal cells 14-20 µm wide, irregularly hexagonal, rather thin-walled.
Seta
3-4 mm.
Capsule
0.6-1 mm; peristome teeth narrowly lanceolate to subulate, smooth to faintly striolate, to 500 µm.
Spores
18-20 µm.
Capsules mature summer. Wet, shaded ledge; moderate elevations (ca. 1100 m); of conservation concern; N.C.; Europe; Asia; Pacific Islands (Hawaii).
On the North American continent, this species is known from a single locality in the Appalachian Mountains (R. H. Zander 1966).
