2. Ptychomitrium Fürnrohr, Flora. 12(Ergänzungsbl.): 19. 1829.
[Greek ptyx, fold, and mitra, turban, alluding to plicate calyptra]
Plants small to robust, tufted or caspitose, dark green to blackish. Stems erect or repent. Leaves erect to crispate when dry, margins entire to serrulate or serrate; medial cells smooth or slightly papillose. Specialized asexual reproduction rare, by 1-seriate gemmae on branched axillary filaments. Seta straight. Capsule ovoid to cylindric, symmetric or slightly curved, smooth to wrinkled or ribbed when dry. Calyptra mitrate, more or less plicate, lobed proximally. Spores smooth to papillose.
Species 40-50 (5 in the flora): nearly worldwide, mostly in temperate regions.
Glyphomitrium canadense Mitten
This taxon was included for western Canada by G. N. Jones (1933), but was excluded from North America by H. A. Crum (1972) and L. E. Anderson et al. (1990). Crum considered Glyphomitrium canadense to be a synonym of the British G. daviesii (Withering) Bridel and suggested that the specimen on which Mitten based the name came from Great Britain.
Cao, T. and D. H. Vitt. 1994. North American-East Asian similarities in the genus Ptychomitrium (Bryopsida). Bryologist 97: 34-41.