Unrecorded liverwort species from Korean flora II Author Choi, Seung Se Author Bakalin, Vadim A. Author Kim, Chul-Hwan Author Sun, Byung-Yun text Journal of Species Research 2012 2012-08-30 1 2 218 223 http://koreascience.or.kr/journal/view.jsp?kj=JOSRB5&py=2012&vnc=v1n2&sp=218 journal article 10.12651/JSR.2012.1.2.218 2713-8615 13146281 2. Porella stephaniana (C. Massal.) S. Hatt., J. Hattori Bot. Lab. 5: 81, 1951. ( Fig. 3 ) Madotheca stephaniana C. Massal., Mem. Accad. Agric. Verona 73(2): 23, 1897. Korean Name: Dong-gang-se-jul-i-kki (ǭġljẃḋnj) 220 JOURNAL OF SPECIES RESEARCH Vol. 1, No. 2 20.0µm 2.0 mm C D 1.5 mm E F H A G B Fig. 3. Porella stephaniana (C. Massal.) S. Hatt. A. plant (ventral). B. part of plant (ventral). C. part of plant (dorsal). D-F. leaves. G. underleaves. H. median cells of leaf. Scale bars: 2.0 mm for A, B, G; 1.5 mm for C-F; 20.0µm for H. Plants 30.0-80.0× 3.2-3.8 mm , prostrate to ascending, green to dark green. Stems irregularly branched, brownish green to reddish green, cross section ca. 0.25-0.30× 0.40 -0.50 m , cortex cells smaller, thick-walled in 1-3 layers, 10.0-15.0×5.0-7.5 µm, inner cells larger, thin-walled, colorless, 15.0-30.0×12.5-20.0 µm, trigones concave. Rhizoids scarce. Leaves imbricate, falcately spreading; lobe obliquely inserted, line insertion arched, not decurrent, concave, obliquely ovate to broadly ovate, 1.5-2.5 × 1.2-1.5 mm , margin slightly crispate, incurved with 2- 5 dentate near base, apex acute; lobule transversely insert- ed, not decurrent, narrowly ligulate, parallel with the stem, 0.8-1.2× 0.4-0.5 mm , margin irregularly dentate, apex acute to obtuse. Cells in the median leaf polygonal, 25.0- 37.5×20.0-25.0 µm, trigones concave, marginal cells subquadrate 10.0-15.0×12.5-17.5 µm, trigones concave, basal cells 37.5-50.0×22.5-30.0 µm, trigones concave; cuticle smooth. Oil bodies 10-15 per cells, elliptical to spherical, slightly granulate, ca. 5.0-7.0×4.0-6.0 µm. Underleaves imbricate, transversely inserted, line insertion arched, short decurrent, oblong to narrowly ligulate, 0.9- 1.2× 0.4-0.5 mm , margin irregularly dentate, apex obtuse to truncate. Habitats. On shaded limestone near the stream in broadleaved deciduous forest. Distribution. Korea , China , Japan ( Hara, 1956 ; Hattori, 1978 ). Specimens examined. Donggang River , Yeongwol-eup , Yeongwol-gun , Gangwon-do , N 37̊16 ′35.9′′ E 128̊32 ′ 05.8′′, Alt. 222 m , 17 Aug. 2010 leg. & det. S.S. Choi 7937 ( JNU ; NIBR ) . Porella stephaniana is a calcicolous species. This species is characterized by (1) lobe stoutly dentate toward base of the ventral margin, (2) lobule dentate nearly throughout margin and (3) median cells 30.0-35.0×25.0 µm, marginal cells 20.0×15.0 µm, walls thin ( Hattori, 1978 ). New Korean name is given as ‘Dong-gang-se-jul-i-kki’, is based on the name of locality.