Grimmia Dry Rock Moss

Description

Plants in flat patches, blackish green. Stems 1-1.5 cm. Leaves homomallous-falcate, oblong-lanceolate, from a clasping base tapering to a long, subulate uncinate point, 2-3.5 mm, margins plane, erect distally, intermarginal bands absent, usually muticous, occasionally short hyaline awns are present, not decurrent, costa narrow proximally; basal juxtacostal laminal cells short-rectangular, straight to sinuose, thick-walled; basal marginal laminal cells quadrate to short-rectangular, thick-walled; medial laminal cells irregularly rounded to quadrate, sinuose, thick-walled; distal laminal cells 2-stratose, irregularly rounded to quadrate. Perichaetial leaves not enlarged. Seta straight, 2.5-3.5 mm. Capsule occasionally present, exserted, oblate, shiny, smooth, becoming striate when dry, stomata absent, annulus absent, operculum conical, peristome split in distal half, basal segments smooth, distal segments papillose.