Leucobryum aduncum Dozy & Molk., Pl. Jungh. 3: 319. 1854.

Tiwutanon, Patsakorn, Chaiyasut, Kasidis, Lumbsch, H. Thorsten & Kraichak, Ekaphan, 2023, Resurrection of Leucobryum scalare Muell. Hal. ex M. Fleisch. (Bryophyta, Leucobryaceae) based on phylogenetic and morphometric evidence, PhytoKeys 222, pp. 27-47 : 27

Leucobryum aduncum Dozy & Molk., Pl. Jungh. 3: 319. 1854.

Figs 6 , 7

Type.

Indonesia. Java: Junghuhn s.n. (lectotype, designated by Yamaguchi 1993, pg. 31: L; isolectotype: L) .

Description.

Gametophytes usually form tufts, small to medium size, 1-8 cm long with leaves, yellowish green to whitish green, brown when dry. Stems erect, less branched, usually with several branches in small gametophytes; central strand absent in cross-section of stems. Leaves falcate-secund, sometimes slightly erect, 2.3-4.4 mm long, 0.5-1.1 mm wide, lanceolate, gradually narrowed to subtubulous point from ovate to oblong base, cuneate, margin entire, acute at the apex, undulate and spinosely prorate on abaxial surface; laminae consisting 1-4 rows, lamina cells quadrate to narrowly rectangular, thin-walled; borders consisting 1-3 rows, border cells linear to fusiform, thin-walled; in cross-section of leaf base hyalocytes in 1-2 rows on the adaxial side and 2-3 rows on abaxial side, if 3 rows, usually consisting 1 large row and 2 small rows; adaxial and abaxial side of median leaves consisting 1 row. Dioicous. Perichaetia terminal on short branches; perichaetial leaves around sporophytes shorter than ordinary leaves, ovate to lanceolate, abruptly narrowed to the point, cucullate, acuminate at apex. Sporophytes dicranoid. Setae elongate, erect, 1.7-2.1 cm long. Capsules ovoid to ellipsoid, inclined, 1-2 mm long, 0.5-0.6 mm diameter; opercula long rostrate; peristomes dicranoid. Calyptra cucullate.

Habitat.

Usually found in more shaded sites with high moisture, on logs, tree trunks, humus, and rocks.

Distribution.

Mainland China, India, Nepal, Sri Lanka, Thailand, Laos, Cambodia, Vietnam, Peninsular Malaysia, Singapore, Philippines, Borneo, Sulawesi, Sumatra, Java, Lesser Sunda Islands, Seram, New Guinea ( Yamaguchi 1993; He 1995).

Illustrations.

Eddy 1990 (fig. 169A-F); Yamaguchi 1993 (Pls. XV, 1-16; XVI, 1-11).

Figures

Figure 6. Gametophyte variation of different populations of Leucobryum aduncum Dozy & Molk.

Figure 7. Leaf shape and size variation from different populations of Leucobryum aduncum Dozy & Molk.