BY L. RODWAY. 247 



1913. 



gibbous beneath, 3 mm. ; iicl with a rather slender beak, 

 ^ mm. ; calpytra long, base broad, apex with short erect 

 iiairs otherwise smooth. 



Very common in shady places. 



POLYTRICHUM Dill. 



Robust, rigid, erect, tall and usually unbranched. Leaves 

 rigid, the base thin and stem-clasping, lamina slender, 

 acute ; nerve very broad, densely lamellated on the upper 

 surface. Capsule broad, in typical forms four angled and 

 carrying a discoid apophysis at the base ; lid rostrate ; 

 calvptra densely clothed with descending hairs ; peristome 

 of 64 very shoiit teeth. 

 Capsule angled ; apophysis present. 



Margins of leaves sharply incurved juni]jerinum 



Margins serrate not incurved commune 



■Capsule round; no apophysis alpinum 



Folytrichum juniperinum Willd. 



Leaves with a sheathing rather broad base and divaricate 

 slender lam^'na with a narrow smooth sharply incurved 

 margin, apex very slender, 6 mm., with few serrations or 

 plain. Capsule prominently four-angled 4 mm. 



Very common in all situations. 



Polytriclium commune L. 



Stems 6-10 cm. Leaves slender 5 mm. tapering to an 

 .acute apex, lamina composed almost entirely of the broad 

 nerve ; margin seiTate not incurved. Capsule oblong, bold- 

 ly four-angled; lid with a very short rostrum. 



Latrobe, Zeehaii. Adamson Peak. 



Polytriclium alijinum L. 



Erect, simple, generally 5-6 cm., the lower portion bare. 

 Xeaves with a shoi-t broad hyaline base and divaricate 

 subulate lamina up to 10 mm., apex very acute, nerve com- 

 posing nearly the whole breadth densely lamellate on the 

 tipper, spinulose on the lower surface ; margin coarsely 

 <ientate. Seta 4-6 cm. ; capsule inclined, ovate-cylindric, 

 about 4 mm. ; smooth ; lid with a slender rostrum nearly 

 as long as the capsule; calyptra short, copiously haiiy; 

 peristome of 64 very minute teeth. 



Intermediate between Polytriclium. and Pogonatum. 



High altitudes Western Mountains. 



Dawsonia E. Br. 



Erect, rigid, robust, simple or rarely branched. Leaves 



