228 HANDBOOK OF BRITISH MOSSES. 



1. O. oltusifolium. 



2. 0. affine, fastigiatum, pollens, tenellum^fallaXj stramineum. 



3. O. speciosum. 



4. O. diaphanum. 



5. O. leiocarpttm, Lyellii. 



0. O. pulchellum. 



7. O. Sprucei, rivulare. 



8. 0. cupulatum, Sttirmii, rupestre, anomalum. 



71. TJLOTA, Mohr. 



Sporangium and peristome as in Orthotrichum ; veil multi- 

 plicate, hairy ; leaves more or less crisped when dry ; leaf- 

 cells at the base narrow ; ocrea indistinct. 



a. Peristome single, or inner very obscure. 



1. U. Drummondii, Brid. ; stem creeping; branches erect ; 

 leaves ovate at the base, linear-lanceolate, slightly crisped 

 when dry ; margin nearly plane ; sporangium exserted, ob- 

 longo-pyriform, obliquely striate. Hook, fy Wils. t. xxxiv. ; 

 Grev.Sc. Crypt. Fit. 115. 



On trunks of trees, especially birch. Scotland, Ireland, 

 and Yorkshire. Bearing fruit in autumn. 



Forming ) ellowish-green tufts, with creeping matted stems. 

 Fruitstalk twisted ; teeth sixteen, spreading when dry, often 

 united in pairs at the tip ; lid acicular. 



2. U. Ludwigii, Brid.; stem creeping; leaves linear-lan- 

 ceolate, spreading, slightly twisted when dry ; sporangium ex- 

 serted, clavato-pyriform, striate above, plicate when dry, and 

 much contracted at the orifice ; veil hairy. Hook, fy Wils. t. 

 xxxiv. ; Grev. Sc. Crypt. Fl. t. 133. ; (Moug. Nest. n. G17). 



On trees, especially young Oaks, in alpine glens. Scotland 

 and Ireland. Bearing fruit in autumn. 



