HYPNKI. 129 



tened, immersed at the base in a mass of rootlets; leaves se- 

 cund, directed upwards, ovato-lanceolate, entire, nerveless; 

 cells narrow, dilated at the base; fruitstalk short, inserted 

 near the base of the fertile branch amongst the rootlets, as 

 represented correctly in ' English Botany ;' sporangium oblong, 

 tapering at the base, curved, suberect; lid conical, pointed. 

 Schimper considers Wilson's plant to be his Hypnum nitidulum, 

 but this, according to Wilson himself, is a mistake. 



80. H. Muhlenbeckii, Br. $ Schimp. ; monoicous ; stem 

 prostrate, slightly divided ; branches and branchlets erect, 

 tufted; leaves slightly flattened, spreading, ovato-lanceolate, 

 acuminate, toothed, faintly two-nerved or nerveless ; sporan- 

 gium subcylindrical, curved, striated when dry; lid conical, 

 blunt. Hook. $ Wils. t. lix. ; Eng. Bot. t. 2016. 



On rocks, or in hollows of grassy declivities in alpine dis- 

 tricts. Scotland. Bearing fruit in summer. 



Forming dense, short, green tufts. Stem prostrate, giving 

 off erect branches and branchlets; leaves slightly flattened, 

 shining, subsecund especially above, ovato-lanceolate, acumi- 

 nate, toothed, nerveless or with two short nerves at the base, 

 thin and transparent ; cells rather loose, enlarged at the base ; 

 perichsetial leaves lanceolate, erect, toothed ; fruitstalk even, 

 | inch long ; sporangium oblong, slightly curved, cernuous or 

 suberect, striated when dry ; lid short, conical. 



Differs from the next in its more tufted mode of growth, 

 more ovate shining leaves, and striated sporangium. 



81. H. silesiacum, Sel.; monoicous ; stem prostrate, slightly 

 divided ; divisions suberect, arched ; leaves loosely imbricated, 

 secund, directed upwards, oblongo-lanceolate, acuminate, 

 slightly toothed, faintly two-nerved; sporangium elongated, 

 curved, cernuous; lid conical-. Hook. Wils. t. lix.; (Moug. 

 % Nest. n. 425.) 



K 



