104 TASMANIAN BRYOPHYTA, 



Fam. 3.— GRIMMIACEAE. 



Plants tufted/ in small dense cushions, or in large, loose 

 mats or in a few genera with spreading decumbent stems 

 with short, erect, branches. Leaves ovate to linear, acute, 

 sometimes with an extended colourless hair point, dull 

 green, yellow or red, opaque ; nerve medium ; margin plain 

 or toothed ; cells small, rotund to quadrate, incrassate, some^ 

 times papillate or nodulose, lower ones longer. Seta ter- 

 minating the stem or a short branch, from very short 

 to fairly long ; capsule erect ; lid from flat with a short 

 umbo to long, rostrate ; calyptra mitrif omi, the base broad, 

 short or long, irregularly split at the base or entire, and 

 6nvelof)ing the capsule, seldom cucullate; peristome dou- 

 ble, single, or none, exostome teeth usually short, and 

 geminate, rarely longer, endostome when present of 8 

 or 16 slender cilia. 



A very distinct family, noticeable chiefly by the 

 dull colour, small cells, and mitriform calyptra of the 

 typical genera. Not easily confounded with members 

 of Tortulaceae, but closely resembling Hedwigia amongst 

 the Neckeraceae, but the leaves of that genus are nerve- 

 less. 



Calyptra with short expanded lacerated base. 



GRIMMIA: Plants small, densely tufted, or, if 

 rather larger, with sessile capsules. 



E.HACOMITRIUM : Plants spreading, irregularly 

 branched, and, except in one species, with sinu- 

 ose walls to the cells. 



Calyptra with a relatively long, broad base, which 

 may be entire, lacerated, or split on one side. 



GLYPHOMITRIUM : Small, tufted. Calyptra 

 grooved Peristome teeth lanceolate or fili- 

 fo'rm, not geminate. 



ORTHOTRICHUM : Tufted. Calyptra slightly 

 hairy. Peristome teeth geminaite. 



TJLOTA : Tufted. Calyptra copiously hairy. Peris- 

 tome teeth geminate. 



