172 HANDBOOK OF BRITISH MOSSES. 



notis, distinguished principally by the distinct cilia of the inner 

 peristome, and in the dioicous species, by the male flowers 

 being disciform, not gemmiform. 



6. B. fontana, Brid. ; stems elongated, simple or dicho- 

 tomous ; leaves dimorphous, the smaller ovate, acuminate, 

 pressed to the stem, the larger erecto-patent or secund, ovato- 

 lanceolate ; male inflorescence discoid ; sporangium cernuous, 

 ovato-globose, thick; lid convex, conical. Hook. Wils. t. 

 xxiii. ; Eng. Bot. t. 390. ; (Moug. Nest. n. 36.) 



In wet spots about springs, especially in alpine or subalpine 

 districts. Bearing fruit in summer. 



Dioicous ; forming yellow-green or glaucous tufts of greater 

 or less density. Stems simple or dichotomous, matted toge- 

 ther with chestnut rootlets ; branches often whorled ; leaves 

 variable in direction, obscurely plicate below, toothed ; margin 

 reflected; perigonial leaves obtuse, nerveless; fruitstalk an inch 

 or more long, nearly straight, tough ; sporangium curved and 

 sulcate when dry ; teeth of outer peristome closely barred ; cilia 

 of inner peristome (Plate 16, fig. 4 d) nearly as long as its teeth. 



A very variable species, of which several distinct varieties 

 are recorded, differing in the length of the stem, direction of 

 branches, form and direction of leaves, size of sporangium, 

 etc. 



7. B. calcarea, Br. fy Schimp. ; dioicous ; stems stout, 

 elongated; leaves crowded, secund or falcato-secund, ovato- 

 lanceolate ; margin plane ; teeth of outer peristome remotely 

 barred. Hook. Wils. t. Hi.; (Plate 16, fig. 4) ; Moug. $ 

 Nest. n. 1118. 



In calcareous springs. Scotland and north of England. 

 Bearing fruit in July. 



Forming large, dense, green, not yellowish tufts. Leaf-cells 

 large, elongated, subhexagonal, especially near the excurrent 



