Bartramia hampeana Müll.Hal.

Plants small to medium-sized, loosely caespitose, yellow-green to glaucous green; terricolous or saxicolous. Stems (3-)8-30(-60) mm high, irregularly branched; in section round, central strand present, inner cortical cells in 3-5 rows, large, thin-walled, outer cortical cells in 1-2 rows, stereids, dark red or occasionally weakly thickened and undifferentiated, epidermal cells differentiated, slightly larger, thin-walled, frequently broken away and stem weakly fluted. Leaves generally compact, generally appressed dry, erect to erect-spreading or occasionally widespreading wet; linear above oblong to obovate base, (1,5-)2.5-4.0(-5.0) mm long, bistratose above base; apex subulate, frequently fragile, ± flexuose above; base sheathing, hyaline, abruptly narrowing to subula, occasionally not as distinct in smaller plants; margins plane, distinctly serrate to denticulate, umstratose. Costa percurrent to short-excurrent as serrate awn, superficial cells long-rectangular, prorate; in section elliptical, guide cells 6-12, ventral stereid band 1-3 cells thick, occasionally substereids, ventral surface cells strongly incrassate, smaller than guide cells, rounded but sharply bulging at ends (prorate), dorsal stereid band 3-8 cells thick, dorsal surface cells strongly incrassate, rounded but bulging outward at prorate cell ends, occasionally not differentiated. Laminal cells rectangular to long-rectangular, 2-8:1, weakly thickened, sharply prorate at both ends; basal cells highly differentiated, long-rectangular, 10-15:1, thin-walled, hyaline, smooth, ± glossy. Dioicous. Perichaetia lateral through innovation, leaves not differentiated. Seta variable in length, 4-10(-15) mm long, yellowish; capsule suberect to inclined, urn subglobose to broadly short-cylindrical, 1.5-2.2 mm long, sulcate dry, occasionally weakly ribbed wet, yellowish with reddish mouth; exothecial cells subrhomboidal to hexagonal, thin-walled, 3-4 rows at mouth transversely rectangular; stomata present at base of urn, phaneropore; peristome absent, occasionally with hyaline fringe at mouth; operculum conic to convex-apiculate; calyptra not seen; spores subround, 30-37 µm, warty, reddish brown.