Solenostoma horikawanum (Amakawa) Váňa,

Choi, Seung Se, Bakalin, Vadim A., Kim, Chul-Hwan & Sun, Byung-Yun, 2012, Unrecorded liverwort species from Korean flora II, Journal of Species Research 1 (2), pp. 218-223 : 221-222

4. Solenostoma horikawanum (Amakawa) Váňa,

Hentschel & J. Heinrichs, Cryptog. Bryol. 31: 137, 2010. ( Fig. 5 )

Plectocolea horikawa Amakawa, J. Jap. Bot. 32: 219, 1957.

Jungermannia horikawana (Amakawa) Amakawa, J. Hattori Bot. Lab. 22: 34, 1960.

Korean Name: Nun-mang-ul-i-kki (ṫặẘḋnj)

Plants 8.0-12.0×2.5-3.0 mm, prostrate to ascending, yellowish green to green. Stems sparsely branched, yellowish green dorsal part, purple ventral part, cross section ca. 0.25-0.35× 0.30-0.35 m, cortex cells smaller, slightly thick-walled in 1 layers, 20.0-25.0×15.0-25.0 µm, inner cells larger, thin-walled, colorless, 25.0-50.0×20.0-37.5

µm, trigones concave. Rhizoids numerous, purple. Leaves contiguously to imbricate, obliquely inserted, obliquely ovate to oblong, slightly concave, 1.1-1.5× 1.2-1.5 mm, margin entire, apex rounded to truncate. Cells in the median leaf polygonal, 30.0-42.5×25.0-37.5 µm, trigones concave to triangular, marginal cells 20.0-25.0×17.5- 25.0 µm, walls thin, trigones concave, basal cells 50.0- 62.5×30.0-37.5 µm; cuticle smooth to slightly striolate. Oil bodies 2-4 per cells, elliptical to spherical, glanulate, biconcentric, ca. 15.0-20.0×5.0-7.5 µm. Underleaves absent. Habitats. On exposed wet rocks near the stream in broadleaved deciduous forest. Distribution. Korea, China, Japan ( Amakawa, 1960). Specimens examined. Mt. Naebyeon, Seokpo-ri, Jinseomyeon, Buan-gun, Jeollabuk-do, N35̊36′42.6′′E126̊ 34′55.5′′, Alt. 39 m, 3 Jul. 2008 leg. & det. S.S. Choi 3- 18 (JNU; NIBR). Solenostoma horikawa is similar to Plectocolea infusca in having ovate to oblong leaves and similar habitat, but differs in having rhizoids purple versus colorless to slightly purple and oil-bodies 2-4 per cells, biconcentric, narrowly oblong versus 4-8 per cells, not biconcentric, oblong to spherical ( Amakawa, 1960).

New Korean name is given as ‘Nun-mang-ul-i-kki’, is based on the character of biconcentric oil-bodies in leaves. The ‘Nun’ means eye in Korea.

Figures

Fig. 5. Solenostoma horikawanum (Amakawa) Váňa, Hentschel & J. Heinrichs. A. plant (dorsal). B. plant (ventral). C-F. leaves. G. oilbodies in median cells of leaf. H. cells at leaf apex. Scale bars: 1.5 mm for A, B, C-F; 30.0 µm for G; 20.0 µm for H.