Fissidens borgenii Hampe

Plants small, forming groups, yellow-green to green; corticolous or rarely saxicolous. Stems 2-3 mm tall, simple; in section subround, central strand present, inner cortical cells large, in 2 rows, outer cortical cells in 2-3 rows, stereids or substereids. Leaves larger above, apically recurved dry, erect wet; ligulate to asymmetrically oval-lingulate, 0.9-1.4 mm long; apex acute to broadly acute; margins minutely crenulate by marginal cell papillae, elimbate or subperichaetial leaves limbate on vaginant laminae only; costa percurrent or ending just below apex. Vaginant laminae to mid-leaf or just above, termination of one blade submarginal to laminal; dorsal lamina tapering proximally, abruptly rounded at insertion. Laminal cells hexagonal to quadrate, 5-10 µm long, obscured by numerous, low, dense, peripheral papillae. Perichaetia terminal; leaves 1.5 mm long, limbidia on vaginant laminae only, laminal cells elongate to rectangular, smooth. Seta 1-2 mm long, yellow; capsule erect to inclining, urn short-cylindrical, 0.5-0.8 mm long, strongly constricted below mouth when dry, yellowish; exothecial cells quadrate, longitudinal walls thickened; peristome deeply cleft, reddish; operculum rostrate; spores round, 10-12 µm, weakly papillose.