GMMMIEI. 239 



On trap rocks. Scotland and Devonshire. Bearing fruit 

 in early spring. 



Forming dense hoary tufts. Stem short ; lower leaves 

 blunt ; hair-points rough, diaphanous ; veil lobed at the base ; 

 lid varying in length ; teeth moderately broad, deeply bi-trifid, 

 perforated, with many transverse bars ; leaf-cells punctiform 

 above, except at the hair-point, where they are narrow, elon- 

 gated, subhexagonal, and apparently not on the same plane, 

 being derived from the nerve ; those of the basal disk shortly 

 rectangular. 



4. G-. ovata, Web. fy Mohr ; monoicous, tufted, more or 

 less elongated; leaves spreading, erect when dry, lanceolate, 

 hair-pointed; margin recurved below; sporangium exserted, 

 firm, oval ; ring large, dehiscent ; lid shortly rostrate ; teeth 

 narrow, bifid. — Hook. iSf Wils. t. xiii. ; Eng. Bot. t. 2165, in 

 part ; (Moug. §• Nest. n. 311). 



On alpine rocks, ascending very high on the Continent. 

 Scotland, Wales, and Leicestershire. Not common. Bearing 

 fruit from autumn to early spring. 



Forming short, dense, or lax, greyish tufts; lid oblique; 

 divisions of teeth unequal ; inflorescence sometimes synoicous ; 

 leaves of a firm texture, bright-green ; leaf-cells in the disk of 

 the lower half rectangular. 



5. G-. Donniana, Smith ; pulvinate, short ; leaves elongato- 

 lanceolate, hair-pointed ; margin plane ; sporangium erect, 

 slightly exserted, oval-oblong ; walls thin ; lid short, conical, 

 obtuse; ring small, persistent; teeth entire or perforated. — 

 Hook. $ Wils. t. xiii. ; Eng. Bot. t. 1259 and 2165 in part. 



On rocks and stones in alpine districts. Scotland, Wales, 

 and Derbyshire. Bearing fruit at the beginning of summer. 



Forming little, short, hoary cushions. Sporangia with a 

 thin, not firm wall as in the last, of a paler tint, a shorter lid, 



