278 HANDBOOK OF BRITISH MOSSES. 



Dioicous; forming green and at length brownish tufts. 

 Leaves glossy ; leaf-cells distinct, short, subpunctiform, gra- 

 dually larger downwards much as in Ceratodon purpureus ; 

 teeth sometimes entire ; lid obliquely rostrate, long and slen- 

 der. 



This is followed in the ' Bryologia' by a doubtful species, 

 not yet found in fruit, D. circinatum, Wils., characterized by 

 its circinate, secund, subulato-setaceous leaves from a suddenly 

 dilated and loosely reticulated base, serrulate at the apex, with 

 a thick and prominent nerve. The figure of D. longifolium, 

 t. xvi., is apparently from a foreign specimen. 



5. D. fuscescens, Smith; stems elongated, tufted, radicu- 

 lose; leaves crisped when dry, lanceolate- subulate, canalicu- 

 late, toothed above ; nerve ex current ; veil large, white ; spo- 

 rangium cernuous, incurved, swollen, ovate, furrowed when 

 dry ; neck swollen ; lid strongly rostrate. Hook, fy Wils. t. 

 xviii. ; Eng. Bot. t. 1597.; (Moug. Sf Nest. n. 821.) 



On alpine and subalpine rocks, sometimes on wood. Bear- 

 ing fruit in early autumn. 



Dioicous ; forming dull-yellowish tufts. Sporangium short, 

 striate ; leaves flexuous above, opaque, not serrate at the back ; 

 beak of lid pale, not red as in the next ; leaf-cells above dis- 

 tinct, subquadrate, but soon becoming elongated, then very 

 narrow, rectangular at the basal angles. 



6. D. scoparium, Hedw. ; dioicous ; loosely tufted, radicu- 

 lose; leaves secund or falcato-secund, lanceolate-subulate, 

 carinato-concave, sharply serrated at the tip ; margin inflexed ; 

 nerve with projecting ridges behind, toothed above ; sporan- 

 gium cylindrical, slightly curved; ring none, beak long. 

 Hook. % Wils. t. xviii. ; Eng. Bot. t. 354. ; (Plate 23, fig. 7) ; 

 Moug. Nest. n. 120. 



Woods, banks, etc. Very common. Fruit in summer. 



