HYPXEI. 91 



On shady limestone rocks and walls, near the sea. In the 

 west of England. Wales; from Anglesca southward. Bearing 

 fruit, though very rarely, in spring. 



Dioicous ; forming more or less dense tufts of a deep green. 

 Stem creeping, bearing slender, erect, arched branches, which 

 are themselves branched above ; the branchlets curved or 

 curled ; leaves crowded, ovato-lanceolate, with a slender nerve 

 reaching almost to the tip, minutely serrate ; fruitstalk even, 

 twisted in different directions above and below ; sporangium 

 ovate, with a long beaked lid. 



Differing from the last in its circinate branchlets ; ovato- 

 lanceolate leaves, with a thicker, longer nerve, shorter cells, 

 and the inner perichsetial leaves being strongly nerved. 



23. H. striatulum, Spruce; stem creeping, densely tufted; 

 branches crowded, erect ; leaves erecto-patent, ovate, acumi- 

 nate, somewhat striated, serrate ; nerve reaching above half- 

 way ; fruitstalk even; sporangium oblong, cernuous; lid 

 rostrate. Hook. % Wils. t. Iv. 



On calcareous rocks, walls, and mounds, and at the roots 

 of trees. First discovered by Spruce in the Pyrenees, and 

 found since in Ireland, Somersetshire, and Sussex. Fruit ripe 

 from December to early spring. 



Dioicous ; forming loose wide tufts. Stems creeping ; 

 branches erect, with fasciculate branchlets ; leaves spreading, 

 ovato-lanceolate, acuminate, minutely serrate, nerve reaching 

 beyond the middle, somewhat striate ; cells very narrow ; 

 fruitstalk even, half an inch long; sporangium oblong, cer- 

 nuous, with a long lid. 



Not half the size of the following, but larger than H. cir- 

 cinatum. 



2 i. H. striatum, Htdw. ; stem prostrate or arched, irregu- 

 larly divided, throwing out fascicles of roots, densely imbri- 



