Bryum coronatum Schwaegr., Sp. Musc. Frond., Suppl. 1(2): 103. 1816.
Protologue: French Guiana and Jamaica. In Guiana legit cl. Richard [lectotype Ochi, 1980], in Jamaica Swartz.
Bryum microbalanum Card., Rev. Bryol. 36: 112. 1909. Protologue: Mexico. Etat de Morelos: près de Cuernavaca, 1908 [Pringle] n. 10662 (MO, US). District fédéral: Cima, en compagnie de B. argenteum L., 1908 [Pringle] n. 15274 in parte.
Plants small, green to yellow‑brown in loose tufts to 2 cm high; rhizoids moderately developed at base. Leaves 1–3 mm long, spreading and somewhat contorted when dry, erect‑spreading when wet, ovate‑ to oblong‑lanceolate; apices acuminate; margins recurved below, indistinctly bordered, entire to subentire; costae long‑excurrent; upper cells rhomboidal, thin‑walled, to 60 μm long, basal cells short‑rectangular, thin‑walled. Dioicous. Setae 10–25 mm long, red. Capsules 0.5–2.5 mm long, dark‑red, pendent, oblong‑cylindrical, neck short and somewhat broader than the urn, rounded and shriveled when dry; annuli compound and revoluble; opercula 0.5 mm long, conic apiculate; exostome teeth brown to yellow‑brown, densely papillose, endostome yellowish hyaline, lightly papillose, basal membrane to ½ of exostome teeth length, segments well-developed, broadly perforate, cilia 2–4, appendiculate. Spores 8–10 μm, lightly roughened. Calyptra not seen.