70 BRITISH HEPATIC^. 



Marginal cells longer than broad, ■^^" by g-ro'j forming a dis- 

 tinct border. Near the upper third the cells are about -g-J o" each 

 way, polygonal. Basal cells g^V' by eoo" or sto"- Trigones (f. 30, 4) 

 TTtt"} large, so as almost to touch each other. The cells contain 

 numerous greenish granules. When prepared with the zinc solu- 

 tion, the appearance of the leaf is very beautiful (f. 4, left hand). 

 The cells are divided by a translucent line passing through the tri- 

 gones, and the contents (except the yellowish nucleus) are stained 

 of a fine purple colour. The cuticle, especially on the outside of the 

 leaves, is covered with pbtuse papillse. 



Inflorescence dioicous. Fructification terminal, but from the 

 growth of innovations at the base of the colesule (f. 30, 6), which 

 rapidly elongate, it not unfrequently appears lateral. 



Involucral bracts (f. 30, 6) two, distinct, orbiculate, larger than 

 the ordinary leaves with. which they otherwise agree, basal portion 

 clasping, apex recurved, uadulate. Bracteole ovate-lanceolate, bifid 

 on one side near the base. 



Colesule (f. 30, 7) ovate, twice as long as broad (■§•"), apex 

 truncate, laterally compressed, regularly denticulate, curved to 

 one side. On section near the upper third the angles are rounded 

 (f. 8, a, h), whilst the base is sub-terete. After the egress of the 

 capsule, the mouth is frequently cleft, so as to appear bilabiate. 

 In texture and colour it agrees with the ordinary leaves, except 

 that the cells are more oblong. 



Capsule (f. 30, 2) ovate-rotund, dark brown, longitudinally 

 striate, cleft into four ovate, coriaceous valves. 



Fedicel an inch or more in length, white, succulent. 



Spores dark brown, spherical, ttVo" in diameter. 



Maters bispiral, yto" long, by -rho" broad. 



Ferigonial leaves forming sub-terminal or interrupted spikes, 

 more crowded, and tumid at the base, than the ordinary leaves. 



Antheridia normally two, spherical, stipes slender jointed. 



Sir W. Hooker states that " upon the leaves of this species a 

 small black tuberculated fungus is frequently present," such as 

 ^^'as previously described as infesting Nardia scalaris. The borders 

 of the leaves, near the apex of the shoots, are sometimes beset with 

 gemmiferous cells, either detached, or aggregated into spherical 

 masses, and which resemble the leaves in colour. 



Stjb-Sp. Anomala. 



Pl. IX. Fig. 29. 



Tufts loosely entangled, creeping over the surface of peat-mosses, 

 or thinly scattered amongst the fronds of Sphagnum. 



Shoots (f. 29, 2) more slender, flexuose, succulent, mostly simple, 

 clothed with dense white radicles on the under side. ' 



