TRICHOSTOMEI. 257 



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

 Wils. t. xliii. ; (Mouff. # Nest. n. 820) ; Eng. Bot. t. 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; caespitose ; leaves spread- 

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

 lahceolate ; 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. fallax, Swartz ; dioicous, caespitose; leaves squar- 

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

 acuminate; margin recurved; nerve subexcurrent ; perichae- 

 tial leaves sheathing, spreading ; sporangium subcylindrical ; 



