Macrocoma lycopodioides (Schwägr.) Vitt

Plants yellowish green or olivaceous above, brown below; corticolous or occasionally saxi colous. Primary stem up to 90 mm long, branches irregular, young stem often subpinnately branched; secondary stem in section with inner cortex 5-9 cells across, incrassate, outer cortical cells in 1-4 rows, consisting of substereids or stereids, outer surface rough. Stem leaves crowded to somewhat distant, frequently reflexed; ovate-acuminate or lanceolate, 0.4-1.1 mm long. Branch leaves crowded, ± equal in size, appressed to spirally appressed when dry, spreading to widely spreading when wet, occasionally reflexed; lanceolate, 0.5-1.0 mm long, keeled to narrowly keeled above, broadly keeled below; bistratose or occasionally unistratose with bistratose patches or unistratose; apex acuminate to acute, occasionally cucullate, fragile; margins plane above, plane to recurved below, entire above, entire or occasionally crenulate to denticulate below. Costa ending below apex to percurrent; ventral superficial cells rectangular or linear; dorsal superficial cells oval or rounded-quadrate above, linear below, smooth to bulging; in section crescent-shaped to subround, flat ventrally, bulging dorsally, guide cells absent, incrassate or consisting of 2-4 ventral substereids or stereids, dorsal surface cells incrassate. Upper laminal cells rounded-quadrate, frequently obscure, homogeneous, incrassate, flat to bulging above, frequently mammillose to papillose below, intercellular spaces numerous, 7.5-14.0 µm; basal cells frequently longer and narrower towards costa. Dioicous. Perigonia terminal on branches or branchlets or lateral on short branchlets, leaves broadly ovate-acuminate to ovate-apiculate. Perichaetia terminal on branches or branchlets; leaves oblong-acuminate or oblong-subulate, 1.8-2.3 mm long. Seta 1.8-4.0 mm long, yellowish or reddish brown to brown, ochrea frequently present. Capsule elliptic or oblong-cylindrical; urn 1.0-1.6 mm long, yellowish brown to brown, smooth, ribbed, neck up to 0.5 mm long; exothecial cells irregularly rounded to rectangular, smaller at mouth, incrassate. Peristome double; outer layer low, fused, pale brown, coarsely papillose; inner membrane low, outer surface smooth, inner surface coarsely papillose, hyaline. Operculum 0.7-0.8 mm long. Calyptra 2.2-2.8 mm long, yellow to yellow-brown to brown, densely hairy. Spores 23-35 µm.