300 HEPATIC^. 



(Glyder Vawr, W. H. P.). 10. Portion of leaf x 290 (Pyrenees, 

 Dr. Spruce). 11, 12. Bracts x 16 (aiyder Vawr, W. H. P.). 

 13. Perianth x 24 (Verona, Massalongo). 14. Antlieridium x 

 85 (Glyder Vawr, W. H. P.). 



6. Jungermania crenulata, Smith. 



Jungermania cremdata, Sm. Eng. Bot. t. 146o (1805); Hook. Brit. Jung. t. 37 



(1816). 

 Aplozia crenulata, Dum. Hep. Eui-. p. 57 (1874). 



Dioicous, loosely caespitose, flagelliferous, small, of a pale 

 green, rosy or reddish colour. Stems reddish-brown, procumbent, 

 cortical cells larger than the inner, whitish, 20 round, inner same 

 colour, 7x8 in diam. ; simple or innovantly branched, innova- 

 tions lateral, arising from axil of leaf, numerous, with small 

 distant leaves ; radiculose, rootlets dull white, plentiful, ascending 

 to apex of stems. Leaves on the upper portion of stem larger 

 and more crowded, imbricate, obliquely inserted, patent, secund 

 or spreading, lower leaves smaller and more distant ; broadly 

 ovate to subrotund; texture somewhat thin, epidermis smooth, 

 cells from smallish to small, roundish-quadrate, 4-, 5- and 6- 

 angled, near the base elongate ('0237 mm.), walls thick, trigones 

 very small or wanting, marginal cells largish ('053 mm.), oblong- 

 quadrate, which give the plant a very distinct appearance, margin 

 quite plane, not crenulate; these large marginal cells are usually 

 wanting in the small leaves of the innovations. Stipules absent. 

 Bracts similar to the leaves, only larger, appressed, sometimes 

 produced from the lower part of the perianth, but very rarely. 

 Bracteole wanting or sometimes rudimentary, then Ungulate. 

 Perianth terminal, projecting about ^ beyond the bracts, com- 

 posed of a single layer of cells, 130 round, larger at the angles, 

 obovate, sHghtly compressed, plicate, 4-angled, angles smooth or 

 irregular, obtuse or acute ; mouth contracted, submucronate, 

 fringed with hyaline, elongate cells, margin crenulate. Calyptra 

 thin, delicate. Pedicel long, pellucid, white, cross-section shows 

 17 cells round, 6 x 6 in diam. Capsule small, oval, dark reddish- 



