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Moss China | Family List | Moss China V. 2 | Pottiaceae

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


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


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