302 HEPATIC^.. 



Found on the Continent and in North America. 



Obs. — Recognised at once, by tlie remarkably large marginal 

 cells, from any of the other round-leaved Jmigermanice. 



The perianths are generally 4-angled, sometimes more ; Dr. 

 Spruce met with a form in the Pyrenees with 8, some with 7, 6, 

 and 5, but he could find no diflPerence whatever from the ordinary 

 /. crenulaia, and remarks : " So that an occasional duplication of 

 one or more of the perianth-angles would seem a common occur- 

 rence in this section." 



Description of Plate CXXVII. — Fig. 1. Plants natural 

 size. 2. Fertile stem x 24. 3-6. Leaves x 24. 7. Portion 

 of leaf near margin x 85. 8. Ditto x 290. 9, 10. Bracts x 

 24. 11. Perianth x 24. 12. Cross-section of perianth, upper 

 half X 24. 13. Portion of mouth of perianth x 85. (All 

 Walton Swamp, Chesliire, Holt & Pearson.) 14. Perigonia] 

 bract X 24 (Baden, Jack). 15. Antheridium x 85 (ditto). 



7. Jungermania crenulata, Hook., var. gracillima. {8}ii.\ 



Jungermania cremdata, var. Hook. Brit. Jung. t. 37 (1816). 

 Jungermania gracillima, Smith, Eng. Bot. n. 2238 (1805). 

 Jungermania Genthiana, Hueben. Hep. Germ. p. 107 (1834). 

 Aplozia gracillima, Dum. Hep. Eur. p. 57 (1874). 

 Aplozia cristulata, Dum. Hep. Eur. p. 57 (1874). 



Dioicous, ca3spitose, tufts shallow, innovations plentiful, 

 marginal cells similar to the others, on stronger stems the 

 tendency to become larger is observable, bracts similar to the 

 upper leaves, perianth mucronate, margin of mouth slightly 

 crenulate, angles of perianth cristulate, calyptra delicate, claret 

 coloured. 



Fruits April, May. 



Hab. — Growing in thin patches on shady sandy or gravelly 

 banks. Generally distributed. 



1, 2, 4, 5. Seckley Wood ; Arley Wood; Dimmings Dale, 

 near Dane Bridge, Staffordshire, /. U. Bagnall. 7. Torrent Walk, 

 Dolgelly, Merionethshire, W. II. P. 9. Alderley Edge, Cheshire, 

 C. J. Wild. 10. Castle Howard, M. B. Slater; Teesdale, Dr. 



