Racopilum P.‑Beauv., Prodr. Aethéogam. 36. 1805.
Medium to robust plants in dark green mats. Stems creeping, irregularly branched, moderately to densely reddish‑brown tomentose, central strand present. Leaves dimorphic; lateral leaves wide‑spreading and complanate in 2 rows, inrolled contorted when dry, ovate to oblong‑ovate, asymmetric, aristate; margins plane, unbordered, entire, serrulate to serrate or dentate; costa excurrent; cells rhombic to widely‑oblong, thick‑walled, smooth or unipapillose; dorsal leaves in two rows, erect to appressed, smaller, lanceolate to triangular, acuminate, aristate. Dioicous, autoicous, or synoicous. Setae elongate. Capsules exserted, erect to horizontal, cylindrical, symmetric or asymmetric, furrowed or smooth when dry; stomata superficial; opercula long‑rostrate; peristome double, exostome of 16 lanceolate teeth, cross‑striolate below, papillose above, endostome basal membrane high or low, segments narrow and fugacious or broad and widely perforate, cilia none or 2–4. Calyptrae sparsely hairy, cucullate.