English: Tree-chainmoss.
Synonym: Leskea nervosa; Leskeella nervosa.
Clades: Pseudoleskeellaceae.
Region: Northern hemisphere, Germany, Austria, Switzerland.
Habitat: base-loving; montane forests on hardwood bark in the lower to middle stem area, more rarely on calcareous rock; prefers forest edges or thinned-out areas in forests; very sensitive to air pollutants; low mountain ranges, rare in the plains.
BotanyMoss; deciduous; forms moderately dense, dark green, interwoven, glossy lawns with its fine-branched plants.
Stem: creeping; adhere to the substrate with rhizoids; up to 8 centimetres long; irregularly to feathery branched; upright branches often have clusters of breeding branches and breeding buds.
Leaves: suddenly to gradually long pointed; broad base; up to 15 millimetres long; entire margins; strong rib reaching the tip of the leaf; rather densely arranged; loosely clinging when wet and dry; leaf tips are protruding to recurved; leaf cells are oval to rounded rectangular in the middle of the leaf and about twice as long as wide, square at the leaf margins and square to transverse rectangular in the leaf wings.
Capsule: cylindrical, slightly curved and erect, not narrowed below the mouth; cap is obliquely beaked; bonnet reaching to the base of the capsule; seta is ± 1 centimetre long; papillose spores have a size of 12 to 16 micrometres; fruits very rarely.