BY L. KODWAY. 15 



A large genus coutinuous with Pottia, and closely 

 allied to IJarbula, but forming a natural group. Separable 

 into two sections, one with the nerve terminating in a 

 short, stiff point, the other in a long colourless hair. 



Leaf with a short, stiflF point. 



Peristome short; plants small. 



Dark green; peristome straight— atrovirens. 

 Pale green ; peristome twisted — recurvata. 



Peristome long ; plants robust. 

 Lid as long as the fusiform 



capsule pungens. 



Lid shorter than the cylindric 



capsule pseudopilifera. 



Leaf with a colourless hair point. 

 Surface papillate. 



Margin plain priiueps 



Margin revolute muralis. 



Surface smooth papillosa. 



TORTULA ATROYIRLinS (S.M.) Lindb. 

 Syn : Desmatodon nervosus, Br. Sch. 



Small and usually massed in clusters. Stem about 2 

 m.m. Leaves dingy green, oblong, L7 m.m. ; nerve very 

 bold, reddish, just excurrent in a short, dense apex ; cells 

 small, opaque, quadrate, the surface with a short nodulose 

 papilla, basal cells rectangular ; margin closely revolute. 

 Seta slender, about 1 cm. ; capsule oblong, erect, 1 m.m. ; 

 lid short, conic ; peristome teeth red, arising from a short 

 basal membrane, irregular, unequal, usually rather short, 

 and banded in pairs, not twisting, often very reduced. 



Verv common on ground. 



TORTULA RECURVATA, Hook. 



Stems very short, erect, tufted. Leaves pale green, 

 oblong, 2 m.m. ; nerve bold, shortly txcurrent in a hard 

 point; margin closclv revolute, surface minutely noaulose ; 

 cells irregularly quadrate above, rectangular below. Seta 

 slender, 2 cm. ; capsule fusiform to cylindric, unequal, 2 

 m.m. ; lid short, conic ; peristome teeth red, short, divided 

 to the base, twisted. 



On the ground Bellerive, Swansea 



