Blindia acuta (Hedw.) B.S.G., Bryol. Eur. 2: 19. 1846. Weissia acuta Hedw., Sp. Musc. Frond. 71. 1801. Type: In montonsis Angliae et Norwegiae (lectotype G, fide Barlett & Vitt 1986).
Plants slender, tufted, greenish yellow to brownish; stems sub-erect, 2–7 cm long, branches irregular, central strand absent. Leaves erect to erect-spreading or secund, evenly spaced, lanceolate, 3.0–3.5 mm long, apex abruptly long-subulate; margins entire below, denticulate to sub-entire above, erect or incurved; costa single, long-excurrent, in transverse section guide cells not differentiated, consisting of only stereid cells; cells smooth and incrassate throughout, upper cells short and irregularly rectangular, basal cells linear, 18–55 × 5–9 µm, reddish above; alar cells strongly differentiated, forming distinct groups, dark, abruptly inflated, thin-walled, reddish brown. Sporophytes unknown in Central America [description from Crum and Anderson, 1981] "setae 5–11 mm long, straight or flexuous-curved above; capsules about 1 mm long, obovoid, becoming pyriform and constricted below the mouth when dry and empty; peristome teeth lanceolate, acute, entire or more-or-less split at the tip dark red or red-brown. Spores 13–18 µm, smooth or minutely roughened, brownish."