]08 STKOPSIS OF BRITISH MOSSES. 



Bogs and damp places. Autumn. 



Eecorded to have been gathered by Mr. TMitten in 

 Wales, August, 1 883, but some of the specimens dis- 

 tributed are certainly Trichost. hrachydontiwm. 



187. B. revoluta, Schwaeg. Densely csespitose. L. 

 crowded, erecto-patent, oblong lanceolate, obtuse, nerve 

 excurrentfrom the blunt apex, margin strongly re volute. 

 Caps, reddish brown, elliptic, symmetric, with a scarcely 

 oblique lid, seta red, straw-coloured above. Dioicous. 



Walls, mostly limestone. May. 



188. B. convoluta, Hedw. Csespitose. L. spreading, 

 lower ovate-lanceolate, upper narrowly ligulate, acute, 

 lanceolate, plane or somewhat undulate in margin, 

 which is reflexed towards base, nerve not excurrent ; 

 per. 1. strongly convolute, nerveless, sheathing. Caps, 

 inclined, oblong-ovate, on a yellowish seta, lid with a 

 long, oblique beak. Dioicous. 



Walls, &c. May, June. 



189. B. commutata, Jurat. Tufts gre^n above, ru- 

 fescent below, taller and more robust than the last. 

 L. spreading, subrecurved, densely and minutely 

 papillose, lower ovate-lanceolate, middle lanceolate, 

 upper lanceolate from an ovate-concave, sheathing 

 base, acute, carinate, margin reflexed, slightly undu- 

 late, and minutely crenulate with papillse, nerve thick, 

 vanishing at apex. Caps, narrowly oblong, incurved 

 on a twisted yellow seta, lid half as long as capsule or 

 more conical, subulate. 



Scotland, Ireland. Eare. 



c. Tortuosse. 



Tufts large, robust. L. linear-lanceolate, flexuose, 

 margins undulate, scarcely recurved, crisped, and 

 twisted when dry. Perist. t. with scarcely a basal 

 membrane. 



