Leptodontium in Moss Flora of China @ efloras.org

18. Leptodontium (C. Müll.) Hampe ex Lindb., Öfvers. Förh. Kongl. Svenska Vetensk.-Akad. 21:227. 1865.

薄齿藓属

Plants small to medium-sized to rather robust, 10–30(–50) mm, sometimes to 70 mm high, in loose tufts. Stems erect, forked or aggregately-branched; central strand absent. Leaves distantly arranged, contorted-curved when dry, erect-spreading or reflexed when moist, oblong-elliptic to oblong ovate-lanceolate, abruptly acute at the apex; margins entire, weakly recurved in the lower half, plane, serrulate in the upper half; costa stout, subpercurrent; upper leaf cells quadrate to hexagonal or rounded-hexagonal, thin- or thick-walled, multi-papillose; basal cells larger, smooth, yellowish or hyaline. Dioicous. Perichaetial leaves rather larger, sheathing at the base. Setae elongate, slender, sometimes aggregated; capsules cylindrical, erect or curved; annuli differentiated, consisting of several rows of cells, deciduous; peristome teeth linear-lanceolate, deeply divided, papillose or obliquely striate, basal membrane absent, rarely with properistome; opercula conic-rostrate, with long-beak. Spores yellowish, finely papillose.

1 Plants usually less than 20 mm high; leaves oblong-ovate, abruptly acute at the apex, not reflexed; upper margins serrulate (2)

+ Plants usually more than 30 mm high; leaves ovate- to elliptic-lanceolate, gradually acute to acuminate, reflexed from the middle; upper margins irregularly serrate (3)

2 (1) Stems densely foliate; leaf cells strongly thick-walled; margins bodered by several rows of pale cells 1 Leptodontium flexifolium

+ Stems loosely foliate; leaf cells thin-walled; margins not bordered 2 Leptodontium handelii

3 (1) Leaf cells ca. 20 µm in diameter, densely covered with branched (bifid) papillae 3 Leptodontium scaberrimum

+ Leaf cells less than 10 µm in diameter, with several simple, small papillae 4 Leptodontium viticulosoides

Lower Taxa