T^RITISH HEPATIC^. a 



Calyptra obovate-turbinate, bearing at the apex the withered 

 style ; texture thin, areolae rhomboid. At its base a few withered 

 pistillidia are seated. 



Capsule spherical, reddish-brown. Seta short, succulent. 



Spores roundish or trigonous, brown, granular. Maters bi-spiral 

 (f. 4-8). 



JPerigonial leaves terminal on more slender stems ; broadly 

 ovate (f. 3), sub-complicate, with a shallow acute notch ; the lobes 

 unequal, connivent, broader and ventricose at the base ; margin 

 hyaline, seldom perfect. Antheridia conspicuous, round or obo- 

 vate ; one or two together ; pedicel slender, jointed, of 4-6 cells 

 (f. 4). 



G. coralloides is intermediate in character between tlie former and following species. 

 G. crenulatum may be distinguished from it by its different habitat, on walls and rocks 

 at lower elevations (not the summit of mountains) ; its smaller size, depressed, circinate, 

 sub-terete stems, of a dark glaucous olive-brown colour, and by the boat-shaped leaves, 

 the margin of which is regularly crenulate. 



Pl. I. Fig. 4. — 1. Stems TMtwral sw«. 2. The same x 16 diam,. : the right-hand 

 drawing is taken from the original specimen described hy N. ah E. ; the'left,from Scotch 

 specimens. 3. Perigonial leaves : the border is more deeply crenate than it should he. 

 4. Antharidium. 5. Stem-lea/oes. 6. Apex of fertile stem, showing the involucral leaves. 

 7. Upper involucral leaf. 8. Mater and spores ; their outline should he rounder and 

 daa-her x 250 



3. Gtmnomitrium crbnitlattjm, Gottsche. 



Pl. I. Fig. 3. 



Tufts depressed, lurid -brown ; barren shoots slender, sub-terete, 

 acute, arcuate; leaves broadly ovate, complicate-concave, closely 

 imbricated ; apex bidentate, sinus narrow, lobes acute, connivent ; 

 margin crenulate, hyaline. Fertile shoots ovate, acute at the apex ; 

 outer involucral leaves convolute-conoid. 



Carrington, Gleanings among Irish Cryp. p. 18, t. i. f 5 (Trans. B. S. Ed. 1863); 

 Gott. et Eab. Hep. Eur. Ex. No. 478. G. coralloides, Taylor's MSS. 



Hab. Not unfrequent in the sub-alpine districts of Ireland on the mortar of 

 walls, and rocks by the road-side, where it takes the place of our G. concinnatum. 

 Stations quoted in Fl. Hihern. probably all belong to it. Dunkerron, and Knocka- 

 vohila. Dr. Taylor. Cromagloun, and Glengariffe, co. Kerry ! Carrantuol, May, 1851, 

 Dr. Moore 1 Lugnaquilla, co. "Wicklow, and Galtymore, A. CarroU. Mardale, West- 

 moreland, G. Stabler I Pass of Llanberis ! Tyfry, July 28, 1828, W. Wilson ! Dart- 

 moor, Devon, 1864, G. Davis ! Fr. May and June. 



Patches flat, depressed, smoky-brown or olive, 2 to 4 inches in 

 diameter. Stems rhizomatous at the base, densely matted together, 

 radiculose. Branches ascending, arcuate, of nearly equal diameter, 

 pointed at the apex, rigid, terete, or slightly compressed, two or 

 three lines in length, by Jth of a line in diameter. Flagellce ser- 



c 



