HYPNEI. 117 



late, acuminate, entire ; nerve reaching halfway ; perichsetial 

 leaves deeply sulcate ; fruitstalk even; sporangium subcylin- 

 dvical, curved, cernuous; lid conical. — Hook. &; Wils. t. lviii. 



In swamps, from Lancashire to Sussex. Bearing fruit in 

 June. 



Forming soft, loose tufts. Stem-leaves broadly cordato- 

 lanceolate, much attenuated, entire, with a- nerve reaching 

 more than halfway up; branch-leaves narrower; cells narrow, 

 larger at the base; fruitstalk 2 inches long; sporangium 

 subcylindrical, curved, with a long neck below the spore-sac. 



Distinguished from H. fluitans by its being dioicous, and in 

 its leaves being broader and shorter, with looser reticulations 

 at the base, and from H. aduncum in the more distant, less 

 truly secund, broader leaves, and shorter and more slender 

 nerve. 



63. H. aduncum, L. ; dioicous ; stem erect, slightly divided, 

 pinnato-ramulose ; branchlets short, uncinate, widely spread- 

 ing; leaves crowded, circinate or falcato-secund, lanceolate, 

 acuminate, striated; nerve thick, reaching nearly to the tip; 

 fruitstalk even ; sporangium oblong, curved, cernuous ; lid 

 conical. — Hook. §■ Wils. t. xxvi. ; (Plate 10, fig. 2) ; Moug. § 

 Nest. n. 1321. 



In marshes. In several places in England. Bearing fruit 

 from April to June. 



Forming loose, fastigiate, yellowish-green or tawny tufts, 

 2 inches or more long. Stem slightly divided ; branches pin- 

 nate ; branchlets short, curved ; leaves crowded, falcato-secund 

 or circinate, narrow, lanceolate, acuminate, entire or obscurely 

 serrate below, more or less striate; nerve strong, reaching 

 nearly to the tip ; reticulations narrow, loose towards the base, 

 broad at the angles ; fruitstalk an inch long, even ; sporangium 

 cylindrical, slightly curved, cernuous ; lid conical, pointed. 



