II YPN El. 97 



creeping, rooting through its whole length, more or less 

 branched, the branches erect or suberect, slender, sometimes 

 slightly pinnate; leaves spreading below, sometimes inclined 

 to be secund above, entire, ovato-lanceolate, very acuminate, 

 translucid ; nerve reaching to the apex or not more than half- 

 way ; cells rather broad, angular ; fruitstalk even ; sporangium 

 oblong, curved or obovatc ; lid conical, acute. 



A very common species, and therefore very variable as 

 regards habit, the shape of the leaves, nervation, length of the 

 footstalk, and form of the sporangium. The small size at 

 once distinguishes it from its nearest allies, as does the co- 

 nical lid from H. Teesdalii and tenellum. 



33. H. radicale, Pal. Beauv. ; monoicous ; stem creeping, 

 irregularly branched; branches rigid, suberect; leaves more 

 or less spreading, cordato-ovate or ovato-lanceolate, from a 

 cordate or deltoid base, acuminate ; nerve vanishing near the 

 apex ; perichsetial leaves larger, wider, membranous, serrated, 

 the nerve vanishing below the apex ; fruitstalk very long ; 

 sporangium arcuate, oblong, ccrnuous ; lid conical, shortly 

 and sharply rostellate. Hook, fy Wils. t. xxvi. 



On moist ground, amongst grass. Anglesea and South 

 AY ales. Bearing fruit in spring. A rare species. 



The above is copied from Wilson's description, as I have 

 seen no specimen. It occurs abundantly in North America. 

 Rather more robust than the last, with larger and firmer 

 leaves of a denser texture, wider and more cordate below ; the 

 nerve also is more prominent. 



34-. H. irriguum, Hook. Wils. ; monoicous ; stem rigid ; 

 branches pinnate ; leaves secund, deltoideo-ovate, acuminate, 

 slightly serrated, strongly nerved; sporangium oblong, curved, 

 cernuous, strongly arcuate and contracted below the mouth 

 when dry ; annulus subpersistent ; lid conical. Hook, fy JFi/s. 



H 



