PTYCH0MITR1EI. 229 



Forming yellow-green tufts. Teeth erect when dry; ex- 

 tremely slender, short cilia or irregular lacinise are sometimes 

 present. 



b. Peristome double. 



3. U. Hutchinsise, Schimp. ; stem erect, branched; leaves 

 erecto-patent, imbricated and nearly straight when dry, lan- 

 ceolate ; margin very slightly reflexed ; sporangium clavato- 

 pyriform, striated ; veil hairy. — Hook. §• Wils. t. xxi. ; Eng. 

 Bot. t. 2523.; (Moug. $ Nest. n. 618). 



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

 Said also to be found in Devonshire. Bearing fruit in 

 summer. 



Forming rather rigid dark-green tufts. Stem brittle ; spo- 

 rangium more or less pedicellate ; fruitstalk twisted; lid ros- 

 trate ; outer peristome of eight bigeminate teeth ; cilia eight, 

 short, in one variety obsolete. 



This recedes from the characters of the genus as far as 

 regards the crispature of the leaves, but the basal cells are 

 narrow. The margin is often quite plane above. 



4. U. Bruchii, Brid. ; pulvinate ; stem decumbent or erect ; 

 leaves spreading, linear-lanceolate, from an ovate concave 

 base, crisped when dry; sporangium on a long fruitstalk, 

 oblongo-pyriform, widely striated, when dry contracted above ; 

 veil very hairy. — Hook. t$ Wils. t. xlv. ; (Moug. §■ Nest. n. 826) . 



On trees. Scotland, Westmoreland, Yorkshire, and Sussex. 

 Bearing fruit in autumn. 



Monoicous ; forming yellowish-green cushions. Fruitstalk 

 twisted ; sporangium almost fusiform when dry ; teeth sixteen, 

 reflexed when dry ; cilia sixteen or eight ; leaves twisted 

 when dry, but not so much as in U. crispa. A very beautiful 

 species. 



5. U. crispa, Brid.; soft, pulvinate; leaves linear-lanceo- 



