Monographs Details: Pireella
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 fairly robust, scattered or loosely tufted, green or yellow-green. Secondary stems irregularly branched to pinnately frondose above a stipitate base. Gemmae frequent. Stipe leaves appressed to squarrose, lance-acuminate from a broad base. Leaves of secondary stems and branches erect-spreading, often spirally ranked, concave, ovate to oblong-lanceolate, acute to acuminate; costa single, elongate; cells rounded-oval to rhombic or oblong-linear, thick-walled, smooth or papillose at back because of projecting ends; alar cells poorly differentiated or quadrate in few to several rows. Setae short or elongate, smooth or ± papillose above; capsules generally exserted, oblong-ovoid; peristome double, the exostome teeth hyaline or yellow. Spores spherical. Calyptrae cucullate or mitrate, sparsely pilose.