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Stems to 1-1.5 cm. Leaves firm when wet, long-ligulate to broadly lanceolate from an oblong base, seldom ovate, 1-1.7 mm, base often elliptic, widened not strongly sheathing, margins plane or weakly recurved in proximal 1/3, apex broadly acute to rounded, entire or apiculate; costa ending 1-6 cells before the apex, rarely excurrent, abaxial costal surface with scattered solid papillae, hydroids absent; distal laminal cells firm-walled, quadrate, 8-10 µm wide, 1:1, papillose. Specialized asexual reproduction by large, spheric to elliptic, red-brown tubers born on an often dense mass of rhizoids buried in soil, 100 to 250 µm long, or in var. gallinula by large gemmae, 120-250 µm, occurring usually singly in leaf axils. Perichaetial leaves obtuse to broadly acute strongly sheathing and convolute; antheridiate plants short-stemmed (to 2 mm), appearing as buds on soil at base of archegoniate plants. Seta 1-1.8 cm. Theca 0.8-1.2 mm. Spores 10-12 µm.
