26. Fissidens incognitus Gangulee, Bulletin of the Botanical Society of Bengal. 11:70. 1957.
Fissidens granulatus Hampe in C. Müll., Gen. Musc. Frond. 61. 1900, nom. nud.
Plants small, yellowish green to brown. Leafy stems simple or sometimes with a few branches, 1.3–5.8 mm long, 1.0–1.3 mm wide; axillary hyaline nodules not differentiated; central strand lacking. Leaves in 5–16 pairs, the lowest leaves much smaller than the upper ones, more or less loosely arranged; middle to upper leaves densely arranged, oblong-lingulate, 0.7–0.8 mm × 0.20–0.25 mm, acute at apex; base of dorsal laminae rounded; vaginant laminae ca. 1/2 –3/5 the leaf length, equal to slightly unequal; costa stout, light yellowish brown, percurrent to shortly excurrent; margins serrulate throughout; cells of apical and dorsal laminae quadrate to hexagonal, 7–12 µm long, thin-walled, highly mammillose and obscure, with cluster of 2–5 high papillae at center; cells of vaginant laminae similar to those of apical and dorsal laminae; limbidia of vaginant laminae of most leaves composed of 2–3 rows of cells, and edged on outside by one row of highly mammillose, pluripapillose cells with thickened walls. Dioicous. Archegonia terminal on stems or on branches, ca. 157 µm long. Perichaetial leaves narrower and longer than stem leaves. Setae erect, 2.5 mm long, smooth; capsules erect, symmetrical; urns 0.8 mm long.
Type. India: 26 XII 1870, Kurz 3358 (isotype H-BR).
Chinese specimen examined: HAINAN: Ba-wang-ling (Mt.), 1974 Team 3183 (IBSC, SYS).
Habitat: on soil; Distribution: China and India.
This species is well characterized by its oblong-lingulate leaves with dorsal laminae rounded at the base and submarginal limbidia on the vaginant laminae, its highly mammillose laminal cells with a central cluster of 2–5 high papillae, and by its symmetrical capsules terminal on stems.
Illustrations: Pl. 81, figs. 1–6.