Weissia dieterlenii Thér.

Plants small, loosely caespitose, yellow-green; terricolous. Stems 2-4 mm tall; in section round, central strand large, inner cortical cells large, in single row, outer cortical cells in 2-3 rows, smaller. Leaves spirally twisted dry, erect-spreading wet; lanceolate, 1.5-2.0 mm long; apex acute, mucronate, frequently obtuse in lower leaves; base oval to oblong; margins narrowly involute, entire. Costa percurrent to very short-excurrent, ventral superficial cells quadrate, papillose, dorsal superficial cells rectangular, smooth; in section round, guide cells 2, ventral stereid band of 1-2 cells only, ventral surface cells similar to laminal cells, dorsal stereid band 2-3 cells thick, occasionally substereids. Upper laminal cells quadrate to subquadrate or angular, weakly incrassate, superficially bulging on both surfaces, papillae low and simple; basal cells rectangular, hyaline, smooth, thin-walled. Paroicous. Antheridia in upper leaf axils; perichaetia terminal, leaves undifferentiated. Seta 6-7 mm long, yellow; capsule short-cylindrical, 1.2 mm long, reddish yellow; peristome present, inserted below mouth, teeth linear, distant, 120 µm high, erect, red-yellow, weakly papillose; operculum rostrate, 0.8 mm long; spores subround to angular, (12-)15-17 µm, irregularly papillose.