Didymodon canoae (Pottiaceae), a new moss species from Inner Mongolia, China

A new moss species in Pottiaceae, Didymodon canoae C. Feng, J. Kou & L. Feng, is described and illustrated from Inner Mongolia, China. It is characterized mainly by blackish-green plants; stems with a hyalodermis and without a sclerodermis; ovatelanceolate to lingulate-lanceolate leaves with acuminate apices; weakly recurved, unistratose leaf margins crenulate by papillose and bulging cells; unistratose and strongly bulging laminal cells with knob-like papillae or mamillose; a costa lacking or with just one layer of ventral stereids and an hyaline area of rectangular cells on the ventral surface. Didymodon canoae is compared with morphologically similar species.