Ptychomitrium crispatum (Hedw.) A.Jaeger

Plants medium-sized, caespitose, dark green, brownish below; saxicolous. Stems 10-20 mm long, occasionally branching above. Leaves incurved dry, widespreading wet; linear-lanceolate above short-oblong to elliptical base, (2.5-)3.0-5.0 mm long; bistratose; apex acute to subcucullate; lamina occasionally reflexed above a weakly appressed base. Costa percurrent, narrow; ventral superficial cells smooth, similar to ventral laminal cells; dorsal superficial cells smooth, rectangular, thickened; in section bulging dorsally (half-round throughout), guide cells 6, small, ventral stereid band 2 or 3 cells thick, ventral surface cells similar to laminal cells, dorsal stereid band (3-)5 or 6 cells thick, dorsal surface cells generally small, thickened, not clearly differentiated but becoming more pronounced distally. Upper laminal cells ± rounded-quadrate, somewhat variable, 5-8 µm, thickened; basal cells rectangular to rhomboidal, yellowish, thin-walled. Seta (4-)5-8 mm long, yellowish. Capsule short-cylindrical, 1.5-2.0 mm long, yellow-brown, mouth red. Peristome teeth narrowly triangular, perforated, reddish yellow, ornately papillose. Operculum rostrate, 1 mm long. Calyptra mitrate, 2 mm long. Spores rounded, 12-16 µm, brownish, bluntly papillose.