BY L. RODWAY. 113 



ORTHOTRICHUM LAWRENCII, Mitt. 



In dense dark cushions, stems 2-3 cm. Leaves ©recto- 

 patent, ovate with a rather obtuse acuminate apex, 2 

 m.m. ; margin plain, erose from collapsed cells and ir- 

 regular papillae; nei've vanishing in the apex; cells 

 rotund, incras.sate, very slightly convex, rectangular below; 

 perichaetials slightly narrower, lanceolate. Seta about 

 1.5 m.m.; capsule oblong, smooth but furrowed when dry; 

 lid obtusely umbonate ; exostome teeth geminate, obtuse; 

 endostome processes very broad half as long. 



One specimen in Gunn's collection ; locality not re^- 

 corded. 



ULOTA, Bridel. 



Habit and appearance of Orthotrichum. Leaves 

 lanceolate to linear, with a slight or broad expansion above 

 the narrow base, concave, flexed, or crisped when dry, 

 margin plain, slightly thickened, sometimes revolute in 

 the middle ; cells small, strongly incrassate, rotund to 

 shortly oblong, those of the expanded base becoming linear 

 with a band of rectangular or quadrate colourless cells on 

 the margin. Seta rather short, thick and twisted when 

 dry ; capsule oblong to cylindric, rarely nearly pyriform ; 

 more or less tapering at the base, deeply furrowed when 

 dry ; lid with a short, slender rostrum ; calyptra campanu- 

 late, enclosing the capsule, clothed with erect, long, hairs ; 

 peristome double, exostome teeth 8 short, geminate, min- 

 utely papillose; endostome processes very slender, shorter. 



Very common on dead or living wood. Differing from 

 Orthotrichum only in the leaf structure. 



Leaves closely crisped when dry. 



Capsule cylindric lutea. 



Capsule subpyriform fulva. 



Capsule oblong Weymouthi. 



Leaves slightly crisped or straight when dry. 



Leaves linear, very acute cochlea fca. 



Leaves lanceolate, acute. 



Cells mostly rotund anceps. 



Cells mostly oblong viridis. 



