BAKTAAM1EJ. 171 



of the branches ; sporangium spherical ; lid minute, convex ; 

 teeth of outer peristome dark-red. 



4. B. CEderi, Swartz ; synoicous ; stems tall, more or less 

 crowded ; leaves spreading or recurved, lanceolate, keeled and 

 toothed at the apex, even on either side, twisted when dry; 

 sporangium small, oblique, globose. Hook, fy Wils. t. xxiii. ; 

 Etty. Bot. 1826.; (Plate 16, fig. 3) ; Mouy. $ Nest. n. 326. 



On moist shady rocks in alpine or subalpine districts, espe- 

 cially when calcareous. Bearing fruit in summer. 



Forming soft, dark-green patches, tinged with brown. Stems 

 elongated, matted together with rusty rootlets ; leaves narrow, 

 lanceolate, spreading and recurved, not suddenly dilated at 

 the base, even on either side, serrated, crisped when dry; 

 margin recurved; nerve scarcely reaching beyond the tip; 

 fruitstalk about i an inch long ; sporangium small, globose, 

 ovato-obJong and sulcate when dry ; peristome like that of B. 

 pomiformis. 



In consequence of the absence of papillae, the leaves are 

 more transparent than in other species. The cells, too, are 

 more regularly rectangular. 



5. B. rigida, Bals. fy De Not. ; monoicous ; stem very short ; 

 leaves crowded, erecto-patent, lanceolate, sharply toothed ; 

 nerve excurrent; sporangium obliquely cernuous; fruitstalk 

 erect ; lid conical. Hook. Wils. t. Hi. 



On mountainous shady banks. Ireland. Bearing fruit in 

 summer. 



Monoicous; forming little compact yellow-green tufts. 

 Branches fasciculate ; leaves rigid, shining ; margin reflected, 

 sharply toothed; fruitstalk elongated; teeth of peristome 

 short, incurved when dry ; inner peristome sometimes wanting 

 or rudimentary ; male fruit gemmiform. 



This and the two following belong to Bridel's genus Philo- 



