TU1CIIOSTOMEI. 257 



sheathing; sporangium erect, oblong; ring narrow. Hook, fy 

 Wils. t. xliii. ; (Moug. % Nest. n. 820) ; Eng. Bot. .2383. 



On walls, rocks, and the naked ground. Bearing fruit late in 

 the spring. 



Forming patches of a brownish-green. Stems and leaves 

 not densely crowded ; nerve much thinner than in the last. 

 I do not find the leaf-cells larger, as stated by Mr. Wilson, but 

 the contrary. 



There can be little doubt that the 'English Botany ' figure 

 belongs to this rather than the last. 



The plant gathered by Mr. Thwaites near Bristol, without 

 fruit, and referred to T. gracilis, is, to say the least, doubtful ; 

 and as it is the only real authority for admitting the species 

 into our Flora, it is better, I think, at present to omit it. 



18. T. vinealis, Wils.; dioicous ; csespitose ; leaves spread- 

 ing, recurved, erect, and loosely incumbent when dry, ovato- 

 lanceolate ; margin slightly recurved, nearly plane above ; spo- 

 rangium ovato-oblong, erect ; ring distinct ; lid shortly ros- 

 trate ; peristome once twisted ; membrane evident. Hook, fy 

 Wils. t. xlii.; Eng. Bot. t. 2316. 



On walls, etc. North and south of England. Bearing 

 fruit in spring. 



Forming yellowish tufts. Differs from T. fallax in the 

 denser tufts, shorter, less recurved leaves, shorter, thicker spo- 

 rangia, shorter fruitstalk, lid, and peristome, simple ring, and 

 smaller leaf-cells. It varies considerably in length, and if the 

 ' English Botany ' figure is rightly quoted it represents a form 

 with longer stems. 



19. T. faUax, Swart z ; dioicous, casspitose; leaves squar- 

 rose, recurved, twisted when dry, linear-lanceolate, keeled, 

 acuminate ; margin recurved ; nerve subexcurrent ; perichss- 

 tial leaves sheathing, spreading ; sporangium subcylindrical ; 



