Pohjankellosammal

Encalypta mutica is a tiny species found on soil in naturally disturbed areas. It might be confused with E. flowersiana as both taxa are absent leaf awn and peristome, but E. mutica has much shorter leaves, smaller spores with granulate ornamentation, and an almost smooth capsule.

Stems 5-8 mm, central strand weakly differentiated, small. Leaves elliptic to ligulate or lingulate, 1-2 mm; apices muticous, obtuse; margins plane to weakly recurved along one margin; costa subpercurrent, narrow, papillose distally; laminal cells 10-15 µm; basal cells rectangular, 25-75 µm, smooth; basal marginal cells not differentiated. Specialized asexual reproduction absent. Seta 4-8 mm, brownish red to black. Capsule short-cylindric, 1-2.5 mm, smooth to weakly striate, yellowish brown, exothecial cells rectangular, walls weakly thickened; peristome absent; operculum 0.5 mm. Calyptra 2-4 mm, smooth, lacerate at base. Spores 22-28 µm, papillose, dark brown.

Könttanukas ehk könt-tanukas (Encalypta mutica) on tanukaliste sugukonda kuuluv sammaltaim.

Ta on Eestis arvatud II kaitsekategooriasse (seisuga 2012).

Eestis võib neid leida kasvamas paekaljudel ja looniitudel (loopealsetel).

Encalypta mutica là một loài rêu trong họ Encalyptaceae. Loài này được I. Hagen mô tả khoa học đầu tiên năm 1899.