HYl'NLI. 107 



On wet alpine rocks. Scotland, Ireland, and Wales. Bear- 

 ing fruit, but very rarely, in summer. 



Dioicous ; forming reddish or purple patches. Stems pro- 

 cumbent, ascending above or sometimes erect, branched in an 

 irregularly pinnate manner; leaves oblong or ovato-oblong, 

 obtuse or apiculate, slightly striated, the tip often cuculliform, 

 entire; nerve red, reaching nearly to the tip; cells at the 

 angles open ; sporangium ovato-oblong or subcylindrical,* 

 slightly curved, cernuous; lid conical. 



Very different in habit from H. stramineum, to which it 

 approaches in character, though externally more nearly re- 

 sembling H. cordifolium. The young leaves only are green. 



49. H. cordifolium, Hediv. ; stem suberect, elongated, ir- 

 regularly divided ; leaves distant, cordato-ovate or ovato-ob- 

 long, entire, blunt, decurrent ; nerve reaching above halfway ; 

 fruitstalk even ; sporangium oblong, curved, cernuous ; lid 

 conical. Hook. % Wils. t. Ivi. ; Eng. Bot. t. 1447. ; (Plate 7, 

 fig. 6) ; Moug. % Nest. n. 518. 



In marshes and ditches. Common. Bearing fruit in early 

 summer. 



Monoicous; the male flowers situated near the female; 

 forming loose, green tufts some inches long. Stem more or 

 less pinnate ; branches short, often cuspidate ; leaves spread- 

 ing, almost squarrose, cordate at the base or ovate, slightly 

 attenuated above or blunt, but always obtuse, entire, concave ; 

 nerve reaching nearly to the tip, large ; cells at base dilated ; 

 fruitstalk even, mostly elongated ; sporangium oblong, hori- 

 zontally cernuous ; lid conical. 



Differs from H. stramineum in the stouter habit and spread- 

 ing, loosely set, more or less cordate leaves. The base of 

 the tufts is generally dark-brown. The reticulation in this 

 is looser than in most neighbouring species, and resembles 



