116 TASMANIAN BRYOPHYTA, 



undulate-papillate above; nerve narrow, vanishing at a 

 distance from the apex; cells oblong, with an almost flat 

 surface, strongly incrassate; basal cells linear, with a 

 narrow band of quadrate colourless cells on the margin. 

 Seta 4 m.m. ; capsule cylindric, broadest at the mouth, 

 from there tapering equally into the seta; linear and fur- 

 rowed when dry, 1 m.m.; lid rostrate; calyptra hairy; ex- 

 ostome teeth short-, pale, obtuse; ©ndostome processes slen- 

 der, shorter.' 



Mt. Wellington- 



MACHOMITRIUM^ Bridel. 



Stems procumbent, elongating, sending up numerous 

 erect short branches. Leaves short, from ovate to linear; 

 nerve usually canaliculate, lost in or below the apex, rarely 

 shortly excurrent ; cells rotund, or nearly so, more or less 

 incrassate, small, convex to coarsely papillose, broader and 

 longer below. Seta slender, seldom lo'ng ; capsule erect, 

 oblong, usually smooth, reddish purple; lid witih a slen- 

 der rostrum; calyptra large bell-shaped, enclosing the 

 whole capsule till nearly mature, plicate, smooth, rarely 

 with erect hairs, plain or variously torn at the base, often 

 split up one side; peristome seldom present, of 16 short 

 lanceolate teeth ; endostome when present usually a short 

 papillose membrane, commonly absent, the mouth theu 

 small, irregularly constricted, the edge thin. 



A large southern genus ; to be recognised principally 

 by its habit. Some of the species are very closely related 

 and difficult to define. It is a matter of individual opin- 

 ion where the line should be drawn. The calyptra, when 

 splitting on one side, may be classed as cucullate- 



Leaves linear, obtuse, apiculate. 



Leaves ereicto-patent asperulum. 



Leaves divaricate Archeri. 



Leaves ovate-lanceolate, obtuse. 



Leaves much twisted when dry microstomum. 



Leaves slightly twisted Wejrmouthii. 



Leaves ovate-lanceolate, acuminate. 



Leaves narrowed from a broad base pusillum. 



Leaves gradually tapering tasmauicum. 



Leaves narrow, lanceolate longirostre. 



Leaves ovate j subacute. 



Calyptra smooth eucalyptorum. 



Calyptra hairy microphyllum. 



