Monographs Details: Ctenidium
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)
Description:Genus Description - Plants rather small to medium-sized, in soft, shiny mats. Stems creeping, pinnately to subpinnately branched; pseudoparaphyllia foliose. Stem and branch leaves differentiated, spreading to squarrose or falcate-secund. Stem leaves ± abruptly narrowed to a slender acumen from an ovate-cordate or cordate-triangular, decurrent base; margins sermlate to serrate all around; costa short and double; upper median cells linear, ± papillose at back owing to projecting upper angles; alar cells subquadrate, enlarged at the extreme angles. Branch leaves smaller, ovate-lanceolate, more strongly serrate. Dioicous (rarely phyllodioicous). Setae smooth or ± papillose; capsules inclined to horizontal, ovoid-cylindric; annulus present; operculum conic-rostrate; peristome double, complete. Calyptrae ± hairy when young.
Discussion:The stem leaves are abmptly acuminate from a broad, decurrent base, and the branch leaves are narrower and less decurrent. The serrate margins and dorsal papillose-projection of upper ends of cells are also distinctive.