280 HEPATIC^. 



The lumen of the cells being clear and the thick walls and 

 angles of a brown colour, the leaves appear to be punctate, 

 bringing into prominence the feature which gives the name to 

 this plant. 



It is more variable in size than P. spimdosa, often growing in 

 small dense pulvinate tufts, very closely entangled, about J inch 

 high. 



Desi iiiPTiON OF Plate CXVII. — Fig. 1. Plants natural size. 

 2. Portion of stem x 24 (Killarney. Dr. Carrington). 3, 4. 

 Upper leaves x 24 (original, Herb. Taylor). 5, 6. Lower leaves 

 X 24 (ditto). 7. Portion of leaf x 290 (ditto). 8, 9. P>racts 

 X 24 (Killarney, Dr. Carrington). 10. Perianth x 24 (ditto). 

 11. Pistillidium x 85 (ditto). 



6. Plagiochila tridenticulata, Taj/l. 



Jungermania sjnnidosa, var. tridenticulata, Hook. Brit. Jung. p. 9, t. xiv. ft". 9, 



10 (1816)?. 

 Radida cornicidata, Dum. Syll. Jung. p. 13 (1831)?. 

 Plagiochila cornicidata, Dvim. Recueil, p. 15 (1835)?. 

 Plagiochila tridenticidafa, Dura. Recueil, p. 15 (1835)?. 

 Plagiochila tridenticulata, Taylor in G.L.IS". Syn. Hep. p. 26 (1844). 



Dioicous, densely csespitose or rarely creeping, small, of a 

 dark indigo-green colour, when dry almost black. Stems filiform, 

 flexuose, dark brown, erect, ramose, branches lateral ; radiculose, 

 rootlets dull white, ascending almost to apex of the stem. Leaves 

 obliquely inserted, patent to divergent-patent, 60° (fronj 50° to 

 70°), distant or approximate, alternate, oblong-ovate or cuneate- 

 ovate, from a narrow base, caducous, 2-3-lobulate, bifid or less 

 often trifid to about ^ or ^, sinus rounded or acute, segments 

 acute or apiculate, margin entire ; texture somewhat firm, cells 

 small, roundish, lumen clear, walls thick, angles thickened and 

 pale brown, no trigones. Stipules wanting or rudimentary. 

 Perigonial bracts middle or end of the stem, 3-5 pairs, closely 

 imbricated, more erect, semi-amplexicaul, ventricose at the base, 

 ovate, trifid ; antheridia spherical. 



Female plants not seen. 



