Monographs Details: Racopilum
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 - Slender to fairly robust plants in dull, dark-green or brownish mats. Stems subpinnately branched. Lateral leaves and complanate in 2 rows, oblong-ovate, somewhat asymmetric, blunt to acute or acuminate, cuspidate to hair-pointed; margins plane, mostly unbordered, serrulate to serrate (at least near the apex); costa excurrent; cells rounded- or oblong-hexagonal, green, smooth or unipapillose, laxer and longer at base or scarcely differentiated. Dorsal leaves also in 2 rows, much smaller, obliquely erect or spreading, lanceolate or ovate, acuminate. Dioicous (usually with dwarf male plants on the tomentum or leaves of female plants), rarely autoicous. Perichaetial leaves long-acuminate from an ovate base; costa long-excurrent. Setae usually red, nearly always smooth; capsules oblong-cyhndric with a short neck, suberect to inclined or horizontal, symmetric or ± curved, furrowed when dry; annulus compound, deciduous; operculum long-rostrate from a convex-conic base; exostome teeth lance-subulate, cross-striolate below, papillose above, trabeculate at back; endostome lightly papillose, consisting of a high, keeled basal membrane, broad, gaping segments, and ± well-developed, nodose or appendiculate cilia. Spores spherical. Calyptrae cucullate (or, rarely, mitrate and short-lobed), bearing few to many erect hairs.