ii v I'M: i. 103 



the base of the perichsetial branches ; forming tawny patches. 

 Leaves not much crowded, spreading, only slightly squar- 

 rose, ovate or ovato-lanceolate, acuminate, far narrower below 

 than the last, but with similar reticulation, entire; nerve 

 reaching far above the middle; fruitstalk even, an inch or 

 more long ; sporangium oblong, curved, subhorizontal ; lid 

 acuminate. 



Similar in many respects to the last, but with narrow, less 

 squarrose leaves, and a well-marked nerve. 



There is, however, a smaller variety, with shorter and more 

 sqnarrose leaves. 



*** Leaves roundish, rather obtuse, entire, mostly two-nerved or 



nerveless. 



I.'). H. palustre, L. ; stem creeping, more or less branched ; 

 branches and branchlets suberect or depressed ; leaves crowded, 

 more or less secund, spreading, elliptic, concave, entire, with 

 one short nerve; fruitstalk even; sporangium ovate, cernu- 

 ous; lid conical. Hook. Wils. t. xxvi. ; Eng. Bot. t. 1303, 

 1665, 2406.; (Plate 7, fig. 1); Moug.fyNest. n. 521. 



On stones, in rivulets in subalpine countries. Not uncom- 

 mon. Bearing fruit in summer. 



Monoicous; forming broad tufts of a dingy or tawny green. 

 Stem creeping, naked below, irregularly branched ; branches 

 and branchlets ascending or depressed ; leaves crowded, often 

 secund, more or less spreading, very concave, entire, ovate, 

 rather abruptly attenuated above, with a nerve which scarcely 

 reaches to the middle, sometimes forked above ; areolatiou 

 narrow, with a few larger cells at the base; fruitstalk half 

 an inch long, even ; sporangium ovate, curved, cernuous ; lid 

 conical, pointed. 



A very variable species. The above description applies to 

 the more normal form, but the leaves are .sometimes nerveless, 



