POLYTRICHIEI. 209 



suddenly larger towards the top of the stem, snbrosulate, pili- 

 ferous ; margin reflexed, entire ; nerve without lamellae ; spo- 

 rangium ovate, quadrangular; apophysis distinct. Hook, fy 

 Wils. t. x. ; Eng. Bot. t. 1199. ; (Moug. % Nest. n. 128.) 



On dry exposed heaths. Bearing fruit in early summer. 



Forming loose tufts. Primary stem branched at the base 

 and densely clothed with rootlets ; leaves entire, except the 

 hair-point; peristome of sixty-four teeth, rather short, but 

 rising from a distinct membrane. 



5. P. juniperinum, Hedw.; stem simple or branched ; leaves 

 spreading, somewhat recurved, linear-lanceolate from a sheath- 

 ing base ; nerve excurrent, muricate behind ; margin inflexed, 

 entire; sporangium acutely quadrangular; lid rostellate. 

 Eng. Bot. t. 1200.; (Plate 18, fig. 7); Moug. $ Nest. n. 



On heaths. Bearing fruit in early summer. 



Forming dense, glaucous patches. Stems 1-6 inches long. 

 Differs from the last in the shorter points of the leaves, and 

 the shorter less distinct basal membrane of the teeth. 



6. P. strictum, Menz. ; stem branched ; densely tomen- 

 tose; leaves erecto-patent, straight, imbricated when dry, 

 rather short; sporangium almost conical. Hook, fy Wils. 

 t. x.; Eng. Bot. t. 2435. ; (Moug. fy Nest. n. 417 a.) 



In turbaries. Bearing fruit in early summer. 

 Forming dense tufts. Stems clothed with white down, 

 varying much in length, sometimes a foot long. 



7. P. commune, L. ; stem simple, elongated ; leaves very 

 long, spreading, recurved, lineari-lanceolate, from a sheathing 

 submembraiious pale shining base, toothed ; lamellae bifid ; 

 perichsetial leaves membranous ; sporangium acutely quadrate ; 

 apophysis distinct; lid conico-rostellate. Hook. Wils. t. x. ; 

 Eng. Bot. t. 1197. ; (Moug. fy Neat. n. 415.) 



