Bryum canariense Brid., Muscol. Recent. Suppl. 3: 29. 1817.
Protologue: Canary Islands, In gramineis arenosis Insulae Teneriffae Rudley legit, Bory St. Vincent communicavit.
Bryum hendersonii Ren. & Card., Bot. Gaz. 15: 44. 1890. Protologue: U.S.A. Oregon, Portland, moist sunny bluffs, L. F. Henderson; California Mrs. Ames.
Bryum percavifolium Ochi, J. Fac. Educ. Tottori Univ., Nat. Sci. 27: 33. 1977. Protologue: Mexico. Tamaulipas: on limestone cliff, vertical surface, karst creast on road to La Perra (El Porvenir), Rancho del Cielo , above Gómez Farias, A. J. Sharp, 20 July 1974, No. 5635c (TENN), syn. nov.
Plants medium-sized to robust, shiny, dark-green to yellowish green, in rosulate tufts, to 30 mm high; rhizoids spiculose papillose, forming a dense brownish red tomentum. Leaves 3–4 mm long, imbricate to appressed, at times weakly spirally twisted when dry, erect‑spreading when wet, oblong to elliptic; apices apiculate; margins obscurely and bluntly serrulate to serrulate, narrowly revolute in lower _, scarcely bordered by 1–2 rows of shorter, narrower cells; costae strong, shortly excurrent; upper cells rhomboidal‑hexagonal, thick‑walled, 16–24 μm long, often in radiating rows, median cells rhomboidal, to 34 μm long, porous‑pitted, basal cells rectangular, thick‑walled, porose‑pitted, 20–40 μm long. Dioicous (?). Setae single, to 30 mm long, reddish brown. Capsules 4–5 mm long, light‑brown, ovoid‑pyriform to oblong‑cylindrical, symmetrical, horizontal to pendent, with well‑developed neck to 2 mm long; opercula 0.5–1 mm long, conic apiculate; annuli compound and revoluble; exostome teeth brown to reddish yellow at base, white above, densely and evenly papillose on dorsal surface, endostome pale yellow, lightly papillose, basal membrane to _ of exostome teeth length, segments well-developed, broadly perforate, cilia 2‑4, appendiculate. Spores 12–18 μm, lightly roughened. Calyptra not seen.