112 HEPATICiE. [Jungermannia. 



Hedge-banks and moist heaths, frequent. Fr. March, Apr.— A deli- 

 cate species, of a pale yellow-green colour, very cellular, the leaves re- 

 mote, their segments sometimes patent. Balls of yellow gemma; are 

 produced at the extremities of the barren shoots, which soon dissolve, as 

 it were, and disappear. 



23. J. byssdcea, Roth, (Byssas-like Jungermannia); stem 

 procumbent branched in a stellated manner, leaves subquadrate 

 obtusely bifid the segments acute, fruit terminal, perianth ob- 

 long plicate, the mouth toothed. Roth, Cat. Bot. v. 2. p. 158. 

 Hook. Br, Jung, t. 12. Lindenb. Syn. Hepat. p. 78 — J. diva- 

 ricata, E. Bot. t. 2463. 



Heathy places, in dry and exposed situations. Fr. Apr, May.— A 

 very minute species, and appearing, to the naked eye, like some byssoid 

 or confervoid plant, rather than a Jungermannia ; it is too of a dark 

 brown colour, and its fructification is terminal, by which character it 

 may be known from the preceding. Mr. Wilson has observed the 

 perianth to be double ; that is, an outer one is occasionally formed by 

 the union of the perichastial leaves, as in J. incisa and some others. 



24. J. connivens, Dicks, (forcipated Jungermannia); stem 

 procumbent branched in a stellated manner, leaves orbicular 

 concave with a lanceolate notch at the extremity, fruit terminal 

 upon proper short central branches, perianth oblongo-ovate in- 

 flated, the mouth ciliated. Dicks. Cr. Fasc. A. p. 19. t. 11. 



/. 15. Hook. Br. Jung. t. 15. E. Bot. t. 1304. Lindenb. Syn. 



Hepat. j)' 91. 



Wet bogs, particularly among Sphagnum and other semi-aquatic 

 mosses. Fr. Apr. — This is beautifully distinguished from J. hicuspi- 

 data, with which it agrees in its mode of growth and texture, by the 

 singular curvation of the segments of the leaves towards each other in 

 a forceps-like manner, by the swollen, much ciliated perianths, and the 

 more divided perichcetial leaves. 



25. J. curvifolia, Dicks, (curve-leaved Jungermannia); stem 

 procumbent branched in a stellated manner, leaves roundisli 

 very concave deeply bifid the long acuminate segments singu- 

 larly incurved, fruit terminal upon short proper central bran- 

 ches, perianth oblong subplicate, the mouth dentate. Dicks. 

 Cr. Fasc. 2. t. 5. /. 7. E. Bot. t. 1304. Hook. Br. Jung. t. 16. 

 Lindenb. Syn. Hepat. p. 9 1 . 



On moist rocks and decayed wood, in alpine districts. Fr. March. — 

 Leaves generally tinged with purple. 



*** Leaves tri-quadrifid ; the segments equal. 



26. J. capitdta, Hook, (capitate Jungermannia); stem pros- 

 trate nearly simple, leaves rotundato-quadrate the lower ones 

 bifid the upper ones collected into a head and tri-quadrifid, 

 fruit terminal, perianth oblongo-ovate subplicate, the mouth 

 contracted toothed. Hook. Br. Jung. t. 80. Lindenb. Syn. 

 Hepat. p. 92. 



Cadnam bog and Lyndhurst Race-course, Hants, C. Lyetl, Esq. Dry 

 mountain rock, near Bantry, Ireland, Miss Hulchins. Fr. Spring. — 



