Monographs Details: Rhytidium
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)
Family:Rhytidiaceae
Scientific Name:Rhytidium
Description:Genus Description - Plants fairly robust and tumid, in loose, yellow-green, yellow-brown, or golden-brown tufts, rigid and somewhat shiny when dry. Stems erect-ascending, sparsely branched on 1 or both sides, sometimes regularly pinnate; stems and branches densely foliose, hooked at the tips; paraphyllia none. Stem leaves crowded and loosely erect when dry, both plicate and rugose, erect-spreading when moist, with secund tips, somewhat concave, oblong-ovate, gradually or rather abruptly narrowed to a long, lance-subulate acumen; margins revolute nearly to the apex, sermlate in the upper half; costa single, slender, about 2/3-3/4 the leaf length; cells linear-flexuose, moderately thick-walled, pitted, many of them with ends projecting at back as rather coarse papillae; alar cells small, quadrate, and incrassate in many rows. Branch leaves similar to the stem leaves but smaller. Perichaetial leaves loosely erect, lanceolate, gradually long-acuminate. Capsules brownish, contracted below the mouth when dry, smooth; annulus broad; operculum convex-conic, obliquely apiculate to short-rostratc; exostome teeth yellow-brown; endostome yellowish, the cilia nodulose.