HYPNET. 95 



sporangium ovate-oblong, cernuous ; lid rostrate. — Hook, fy 

 mis. t. lix. 



On calcareous rocks and stones. From Scotland to Angle- 

 sea. Ripening fruit, on the Continent, in spring. 



Dioicous; forming very flat, soft, emerald-green or some- 

 times yellowish patches. Stem repeatedly divided; branches 

 more or less pinnate ; leaves flattened, crowded, ovate or ovate- 

 oblong, with two short nerves at the base, pointed but scarcely 

 acuminate, slightly serrate; fruitstalk even, half an inch long ; 

 sporangium ovate-oblong, slightly curved, cernuous; lid ros- 

 trate, shorter than the sporangium. 



This species, which is intermediate between H. confertum 

 and the next, is readily distinguished by its much flattened 

 branchlets and different nervation. It has not been found in 

 fruit in this country. 



30. H. demissum, Wils. ; stem prostrate, slightly and 

 irregularly branched; leaves somewhat flattened, subsecund 

 above, ovato-lanceolate, narrowed at the base, entire, nerve- 

 less, or with two faint nerves; margin recurved; fruitstalk 

 even, very slender ; sporangium elliptic-oblong, cernuous ; lid 

 with a very slender long beak. — Hook. §■ Wils. t. lix. ; Eng. 

 Bot. t. 2740. ; (Plate 11, fig. 6) ; Moug. $ Nest. n. 1315. 



On quartzose rocks. Killarney and Beddgelert. Bearing 

 fruit in summer and winter. 



Monoicous ; forming flat, bright, shining, yellow patches ; 

 stems prostrate, more or less divided, scarcely interwoven • 

 branches few, short; leaves spreading below, rather secund 

 above, oblong or elliptico-lanceolate, narrow and somewhat 

 eared at the very base ; nerveless or with two faint nerves ; en- 

 tire, slightly reflexed; fruitstalk one-third of an inch high,even 

 very slender ; sporangium oblongo-elliptic, small, cernuous 

 sometimes symmetrical ; lid with a very long slender beak. 



