WEISSIEI. 291 



sporangium very small, roundish ; lid rostrate. Hook, fy Wils. 

 t. xv. ; Eng. Bot. t. 1988. ; (Moug. fy Nest. n. 407.) 



In crevices of rocks, especially such as are arenaceous or 

 granitic, and on moist banks in subalpine districts. Bearing 

 fruit in summer. 



Monoicous ; forming irregular, yellowish cushions. Leaves 

 long, flexuous, recurved, crisped when dry, entire or slightly 

 toothed ; nerve large, vanishing below the tip ; leaf-cells dis- 

 tinct, with thick walls, subquadrate, rectangular and hyaline 

 below ; teeth almost filiform above, from a lanceolate base, 

 fugacious. 



2. B. denticulata, Br. fy Schimp. ; tufted ; leaves linear- 

 lanceolate or lingulate, strongly toothed above, keeled ; spo- 

 rangium apophysate. Hook. $ Wils. t. xv. ; (Plate 24, fig. 5.) 



In crevices of alpine and subalpine rocks. Bearing fruit in 

 summer. 



Monoicous ; forming irregular, green patches. Steins stouter 

 than in the last ; leaves crisped when dry, far less attenuated, 

 often strictly lingulate, strongly toothed above ; leaf-cells as 

 in the last, but larger and not so full of chlorophyll, so that 

 the leaves are more transparent, especially below ; sporangium 

 larger, subglobose, with a more distinct apophysis, less deeply 

 sulcate when dry ; lid subulate ; teeth narrow, from a lanceo- 

 late base, persistent. 



106. WEISSIA, Hedw. 



Sporangium without striae, on a long straight fruitstalk; 

 ring persistent ; peristome single, of sixteen equidistant, nar- 

 row teeth, mostly free at the base, transversely barred, without 

 a medial line, entire, bifid or perforated ; leaf-cells very minute 

 above. 



1. W. contro versa, Hediu.; csespitose; leaves linear-lan- 



u 2 



