Jungerniannia.] HEPATICjE. 123 



general occurrence. At Allan's Ford, near Durham, Mr. Thomhill 

 used to say he could have loaded a cart with it. Fr. rare, March, {BUI.) 

 Apr. to June, (at Cotteral wood, Cheshire), Mr, Wilson. 



This is a very peculiar plant and like no other European species. Its 

 leaven are so crowded and so cut into fine capillary interwoven segments 

 that the whole has almost the texture of sponge. The colour is peculiarly 

 pale and there is no apparent calyptra, at least at the time when the fruit 

 is in perfection. 



** Lower or smaller scgmeiits (of the leaves) involute. 



67. J. 3Iachdii, Hook. {Mr. Macknys Jungcrmunnia); stem 

 creeping irregularly branched, leaves unequally 2-lobed the 

 upper lobes rounded the lower ones minute involute, stipules 

 large roundish obcordate, fruit lateral and terminal, perianth 

 obcordate compressed gibbous below, the mouth contracted ele- 

 vated toothed. Hook. Br. Jung. p. 53. E. Bot. t. 2573. Hobs. 

 Br. Mosses, v. 2. n. 97. Lindenb. Sun. Hepat.p. 20. 



Trunks of trees and rocks, especially in a limestone country, rare. 

 Dargle, J. T. Mackay, Esq., and Ballilicky near Bantry, Miss Hutchins* 

 Killarney, Mr. Wilson. Lowdore, Cumberland ; and Mt. Edgecombe, 

 Devon, C. Liu 11, Esq. Throughout the limestone tracts in the south of 

 Devon, particularly in the fissures of rocks near Torquay, W. J. H. 

 River side, Aber, N. Wales, Mr. Wilson. Fr. Winter and Spring. — 

 A very distinct and little known species. The capsule (of a delicate 

 texture) is globose and the spiral filaments are enclosed in transparent 

 tul es, as in the remaining species of this and the following subdivision. 



68. J. serpul/ifolia, Dicks, {thyme-leaved Jungermannia); stem 

 creeping irregularly pinnated, leaves unequally 2-lobed upper 

 lobes rounded lower ones minute involute, stipules rounded acute- 

 ly bifid, fruit lateral, perianth broadly obovate pentagonal, the 

 mouth contracted elevated and somewhat toothed, capsule pel- 

 lucid quadrifid. Dicks. Cr. Fasc. 4. p. 19. Hook. Jir. Jung, 

 t. 42. E. llm. i. 2537. Hobs. Jh-. Mosses, r. -2. n. 10-.. Lindenb. 

 Syn. Hepat. p. •i\.— ir,ll. Muse. i. 72. f. 30. 



Trees and rocks in alpine and subalpine districts. Fr. Apr. May. — 

 A small pale green plant, forming, with the three following species, 

 a mosl natural and beautiful little groupe, distinguished In their angular 

 perianths, white, membranous, transparent, reticulated, quadrifid capsule 

 and green seeds. By its affinity to ./. Mackaii, however, it is connected 

 with ./. lluiihiushc and oth< r 



(if. J. hamatifdlia, Hook, (hook-leaved Jungermannia); stem 

 creeping irregularly branched, leaves unequally 2-lobed the 

 upper lobes ovate acuminate oft -n carved at the point the lower 

 ones involute, stipule ovate acutely bifid, frail lateral, perianth 

 obovate pentagonal, the mouth contracted elevated toothed, 

 capsule transparent quadrifid. ll<»>h. Br. Jung, t. 51. /.'. Hoi. 

 t. l'o'.'l'. I. null nit. Syn. Il< /in', p. 23. — 3. echinataj leaves beauti- 

 ful echinated. Hook, L c. SttppL t. '■'>. 



Rocks ami trees, bul local and in subalpine districts. Yorkshire, 

 Cumberland, Devonshire. About Dublin and in the south of Ireland, 

 where Miss Hutckins foond it growing on the items of C/ifci 



