322 HEPATIC^. 



Idris, W.H.P.). 17, 18. Ditto X 85 (Original, Hb. Nees). 

 19. Ditto (Cacler Idris, W.H.P.). 20. Bracteole x 24 (ditto). 

 21. Perianth x 24 (Original, Hb. Nees). 22. Pistillidia x 85 

 (ditto). 23. Spores x 290 (Helsingfors, Lindberg). 24. Elaters 

 X 290 (Ditto). 25. Antheridia x 85 (Cader Idris, W.H.P.). 

 26. Ditto, rather young (ditto). 



17. Jungermania capitata, Hook. 



Jungermania e.vcisa, Dicks. PI. crypt. Brit. fasc. Ill, p. 11 (170,3) ?; Lindb. 



Muse. Scand. p. 7 (1879). 

 Jungermania capitata. Hook. Brit. Jung. p. 86 (1816). 

 Jungermania excisa, var. crisjyata, Hook. Brit. Jung. t. 9 (1816). 

 Jungermania intermedia, Lindenb. Syn. Hep. Eur. p. 83, p. 93 (1829). 



Paroicous, csespitose, small, pale or dark green in colour. 

 Stems simple or innovantly branched, frontally compressed, 14 

 cells X 10, cortical cells darker; prostrate or suberect, somewhat 

 succulent. Leaves above semi-vertically and below sub-horizon- 

 tally inserted, crowded, imbricate,- capitate, crisp and undulate, 

 below smaller and more distant, ovate, orbicular or subquadrate, 

 bifid to about |-, rarely trifid, uppermost leaves and sub -bracts 

 trifid, sometimes quadrifid, segments acute, sinus obtuse, sometimes 

 lunulate ; texture tender, cells from moderate to largish in size 

 (•038 mm.), 4-, 5- and 6-sided, somewhat thin walls, trigones very 

 small. No stipules. Bracts broadly ovate or orbicular, quadrifid, 

 segments irregular. Bracteole free or connate with a bract, 

 obovate or oblong-quadrate, obtuse or apiculate, sub-bracts with a 

 large lateral antical segment to enclose the antheridia. Perianth 

 obovate or oblong-obovate or subcylindrical, upper third portion 

 slightly folded, 4 or 5 furrows, mouth contracted, bluntly dentate, 

 teeth one cell long, usually very short, often tinted slightly 

 purple. Pistillidia about 20. Calyptra delicate. Spores brown. 

 Elaters bispiral, brown. Antheridia inserted immediately below 

 the perianth, 1, 2 or rarely 3 at the base of each bract and sub- 

 bract. 



This plant is sometimes gemmiparous, geramse diamond- 



