108 TASMANIAN BRYOPHYTA. 



Leaves not tipped with a colourless apex. 



Cell walls not sinuous crispulum. 



Cell walls sinuous rupestre. 



Leaves tipped with a colourless hair. 



Leaves closely imbricate when dry 



symphyodon . 



Leaves loose when dr)^ heteflrostichum. 



Plants hoary, with white leaf tips. 



Leaf tip straight when dry hypnoides. 



Leaf tip bent when dry pruinosa.n. 



KHACOMITRIUM CRISPULUM, H.f. et W. 



Forming rather dense mats on rocks, stems 2-4 cm., 

 blackish, except the ends, which are olive green. Leaves 

 patent, from an ovate base, tapering to a subulate point 

 or only acute, 2 m.m., rather coarsely papillose; margin 

 closely revolute ; nerve narrow, continuous ; cells incras- 

 sate, rectangular, the lower ones slightly longer, without 

 sinuous walls. Seta 2 m.m., on a short lateral branch; 

 capsule erect, broadly oblong, usually shining, 1.3 m.m.; 

 lid convex with a slender rostrum half as long as the 

 capsule; peristome teeth short, slender, bifid. 



Mt. Faulkner, Glen Leith, Huon. 



RHACOMITPIUM RUPESTRE, H.f. et W. 



Robust in dark matted tufts, the stems often 5 cm., 

 dichotomously branching, but in alpine forms often with 

 short lateral branches. Leaves squarrose, ovate-lanceolate, 

 rather acute, not tipped with a hyaline point, concave, 3.3 

 m.m. ; margin revolute below, plain above, often irregular- 

 ly serrulate; nerve canaliculate, gradually vanishing to- 

 wards the apex ; cells narrow linear below, shorter above, 

 minutely nodulose, the walls sinuous. Seta 3 m.m., on a 

 short lateral branch; capsule broadly oblong, 1.8 m.m., 

 rather constricted at the mouth ; lid with a slender ros- 

 trum nearly as long as the capsule; calyptra rather rough 

 at the point; peristome teeth split nearly to the base into 

 two slender closely tomentose legs. 



Summit Mt. Wellington. Mt. Field. 



