1Leaves transversely undulate along the costa at least when dry; cell pattern of lamina in apical half at least partially very irregularDicranoloma platycaulon
1Leaves smooth, plicate or undulate only along margin near the base; cell pattern of lamina in apical half ± regular2
2Leaf tips setaceous, with upper half of the leaf almost entirely occupied by the costa; lamina in the apical half of leaf consisting of 1 to a few cell rows; laminal cells in apical half isodiametric to oblong, always shorter than 50 µm, usually much shorter3
2Leaves with a well-developed lamina throughout, with costa not occupying more than half the leaf width in the apical part of the leaf or if leaf tip setaceous then laminal cells in apical half mostly elongate to linear and longer than 50 µm4
3Plants 2.5–10 cm tall; costa wide; leaf apices mostly hardly altered when dryDicranoloma menziesii
4Abaxial side of costa with scattered teeth or prorate cell ends toward apex; plants glossy when fresh; sporogones usually solitary, very rarely 2 per perichaetium5
4Abaxial side of costa with rows of teeth toward apex; plants dull when fresh; sporogones when present, usually more than one per perichaetium6
5Leaves 4.7–8.8 mm long, 0.9–1.7 mm wide; leaf apices generally twisted when dry; innermost perichaetial leaf with an obtuse to acute or emarginate apex or with a short cuspDicranoloma billarderii
5Leaves 6.4–24.0 mm long, 0.7–2.1 mm wide; leaf apices not or scarcely twisted; innermost perichaetial leaf with a hair-like acumenDicranoloma robustum
6Leaf margin serrate, at least in the apical half; juxtacostal cells at c. one-third of the leaf length mostly clearly differentiated and shorter than the intramarginal cells; leaves distinctly plicate, narrower than the combined tomentum and stem widthDicranoloma dicarpum
6Leaf margin serrulate in the upper quarter or less; juxtacostal cells not differentiated; leaves smooth or occasionally very slightly plicate, wider than the combined tomentum and stem widthDicranoloma fasciatum
