622 Froceedings of the Royal Irish Academy. 



at the points, the lower tooth incurved. Amphigastria qnadiifid^ 

 broader than the stem. 



Jungermannia reptans, fB. pinnata, Hook. Brit. Jung., t. 75. Lepi- 

 dozia pinnata, Dumort. Rev. Jung., p. 19. Lepidozia tumiduhi, 

 Taylor, in Gr. L. et N. Synop. Hepat., p. 206. Lepidozia cu- 

 pressina, Lindberg, Carring. Irish Hepat., Trans. Bot. Soc. Edin. 

 7, p. 453, tab. 2, fig. xi. , 



Hab. On the ledges of damp rocks and on banks. Yery abundant in the 

 Killarney woods. In the larger size and general appearance of 

 this plant, it shows a difference compared with the former species. 

 It varies, however, so much in these respects, according to the 

 habitats where it grows, that it is not easy to separate them dis- 

 tinctly. The form and size of the areolae are, however, different, 

 as pointed out by Dr. Carrington, and the incurved central tooth 

 of the leaves is constant in the latter. Dr. Lindberg, who has of 

 late years stiidied the Hepaticse so carefully, considers the Irish 

 plant to be specifically identical with the Ameiican L. cupressina^ 

 in which respect Dr. Carrington agrees. 



Bazzakia, Bennett, Gray. 



Jungermannia, L. PL Suec. 1 ed., p. 335, excl. Synon. Micheli (1753) ^ 

 Hook, emend. Brit. Jung. (1816). Bazzania, B. Grr. in Gray's 

 Nat. Arr. Brit. PL 1, p. 704 (1821). Pleuroschisma, sect. 3, 

 Pleuroschismotypus, Dum. Syll. Jung. Europ. p. 70 (1831). 

 Herpetium, JSees, ISTat. Eur. Leber. 1, p. 96 (1833). Masti^■o- 

 bryum, G. L. et I^. Synop. Hepat., p. 214 (1845). 



Involucre polyphyllous, bracts scale-like, imbricated on each side. 

 Colesule dorsal, subacuminate, compressed at the mouth, pe- 

 duncles inarticulated. 



1. Bazzania trilolata (Mich., L.), B. Gr. Stems creeping, branched^ 

 with flagelliE. Leaves incubous, ovate, concave, narrowed towards 

 the points, which are tridentate. Amphigastria broad and quad- 

 rate, as wide or wider than the stem. Colesule dorsal, slit on one 

 side, mouth entire. 



Jungermannia trilobata, Linn. Sp. PI. 1599 ; Hook. Brit. Jung. 

 t. 76 ; De Is'otar. Hepat. Ital. p. 20 ; Taylor, in Fl. Hib. p. 65. 

 Jungermannia radicans, Hoff. Germ. 2, p. 87 ; Engl. Bot. t. 2232. 

 Pleuroschisma trilobata, Dumort. Syll. Jung. Eur. p. 70, n. 96, 

 et Hepat. Europ. p. 103. Mastigobryum trilobatum, G. L. et JS". 

 Synop. Hepat. p. 230. 



Hab. Mountain woods, and rocky places, in many parts of the country. 

 Sleemish Mountain, Co. Antrim ; Dart Mountain, Co. Derry. 

 More abundant in the south, especially in the Killarney woods. 

 About Kylemore, Co. Galway. 



