82 HANDBOOK OF BRITISH MOSSES. 



fruitstalk about an inch high, granulated ; sporangium ovate 

 or ovate-oblong, arcuate, cernuous ; lid conical, variable in 

 length, acute, or sometimes acuminate. 



Allied to the last, but distinguished by its dioicous inflores- 

 cence and decurrent leaves. These vary much in shape, and 

 sometimes the branches are fasciculate, and the plant acquires 

 a dendroid habit. 



10. H. populeum, Swart z, Hedw. ; stem procumbent, ir- 

 regularly branched ; leaves narrow, lanceolate, extremely acu- 

 minate, serrated above ; nerve reaching to the tip ; lid large ; 

 fruitstalk slightly scabrous ; sporangium cernuous, oval ; lid 

 conical, very acute. Hook, fy Wils. t. xxiv. ; Eng. Bot. t. 

 1584. ; (Moug. $ Nes',. n. 519.) 



On stones, trunks of trees, and rocks. Common. Bearing 

 fruit in winter and early spring. 



Monoicous; forming depressed, green or sometimes reddish- 

 brown patches. Stems creeping, bearing little tufts of root- 

 lets, slightly branched ; branches often simple, attenuated up- 

 wards ; leaves loose, lanceolate, very long and narrow, slightly 

 serrated above; margin plane or recurved; cells narrow, but 

 loose, much broader at the base ; nerve reaching to the 

 tip; fruitstalk \ an inch high, minutely and distantly sca- 

 brous above, but only under a high magnifying power, even 

 below; perichsetial leaves squarrose, almost filiform above; 

 sporangium subglobose, slightly cernuous ; lid conical, gra- 

 dually attenuated, very acute, almost rostrate. 



A delicate species, varying however in size, and in conse- 

 quence resembling sometimes H. velutinum or H. plumosum, 

 from the latter of which it differs in its narrow, less acuminate 

 leaves and larger sporangia ; from the former, in the leaves, 

 less scabrous fruitstalk, and longer lid. 



11. H. plumosum, Swart z ; stem creeping; branches 



