Leucoloma tortellum (Mitt.) Jaeg., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1870–71: 413. 1872. Poecilophyllum tortellum Mitt., J. Linn. Soc., Bot. 12: 94. 1869. Syntypes. Trinidad, Crüger; Brazil, Spruce 67; Venezuela, Spruce 676.

Plants medium sized, dull, yellowish green to brown-green; stems 1–2 cm long. Leaves crowded, evenly spaced, crisped to strongly flexuous when dry, ovate at base, gradually narrowed and linear above, 2.5–3.5 mm long, apex thickened and bistratose, blunt, broadly acute to weakly obtuse; margins incurved below, plane above, entire to obscurely crenate by papillae or sparsely denticulate at the extreme apex, limbidia at midleaf 1–3 rows of elongate hyaline cells, border not reaching the apex and merging with the basal cells below; costa ending below the apex or percurrent, papillose above at back; upper leaf cells quadrate to oblong, incrassate, densely pluripapillose; basal cells rectangular, incrassate, smooth; alar cells inflated, firm-walled, yellow-red. Asexual reproduction by thickened, fragile leaf tips. Dioicous. Setae red, 4–5 mm long; capsules erect, oblong, roughened at base, red, 1–2 mm long; peristome teeth entire, reddish brown, weakly striate-papillose on dorsal surface at base, 125 µm long; opercula not seen. Calyptrae not seen. Spores lightly papillose, 17–22 µm.