H MUSCI. [Weisna. 



On Ben Bulben, near Sligo, Mr. J. T. Maehay. The peristome, 

 though exceedingly short, consists of 16 equidistant, triangular, acute 

 teeth, and is therefore very different from that of E. streptocarpa, 

 exhibiting filiform processes, or of the last species, where it would seem 

 to be almost wanting, and hence has been termed fugacious by several 

 botanists. 



12. WEISSIA. Hedw. 



Seta terminal. Peristome single, of 16 entire, equidistant 

 teeth. Calyptra dimidiate. Capsule without an apophysis. 



Grimmia apocarpa and Grimmia maritima come under the above 

 definition, yet it would scarcely be justifiable to remove them to the 

 present genus. W. striata shows some appearance of an apophysis. 



1. W. Starkeanay HEDW. Stems very short ; leaves ovate, 

 their nerve excurrent, capsule ovate, erect ; lid conical, obtuse ; 

 teeth of the peristome subulate. Hedw. St. Cr. v. 3, t. 34. 

 Muse. Brit. ed. 2. p. 79, t. 14. 



On dry banks near Dublin. 



2. W. lanceolata^ HOOK, et TAYLOR. Leaves ovate, their 

 nerve excurrent ; capsule ovate ; lid obliquely rostrate. Muse. 

 Brit. ed. 1, p. 45, ed. 2, p. 80, t. 14. 



Near Dublin, on banks near the sea. 



3. W. striata, HOOK, et TAYLOR. Leaves linear, denticulate, 

 crisped when dry ; capsule ovato-turbinate ; lid obliquely sub- 

 ulate. Muse. Brit. ed. 1, p. 45, ed. 2, p. 81, t. 15. 



Powerscourt Waterfall near Dublin. The capsule is furnished with 

 a narrow apophysis. This plant varies much in size. 



4. W. trichodes, HOOK, et TAYLOR. Stems very short ; leaves 

 subulato-setaceous, entire ; capsule ovate, striated ; lid rostrate. 

 Muse. Brit. ed. 1, p. 45, ed. 2, p. 82. t. 15. 



On granite rock, moistened with the spray of a rivulet near Lough 

 Bray ; very rare. It is allied in habit to Weissia pusilla. It is 

 doubtful if the processes of an annular membrane within the mouth 

 of the capsule can properly be said to be of the nature of the peris- 

 tome of a Wessia. 



5. W. cirrata, SCHRADER. Leaves broadly subulate, crisped 

 when dry, their margins recurved ; capsule ovate; lid rostrate. 

 Schrad. Diario Bot. 1799. 2, p. 58. Muse. Brit. ed. 2, p. 82, 

 t. 15. 



On rocks in the mountains ; not uncommon. It varies in the length 

 of the leaves and of degree of reflexion of their margins, but these 

 are never incurved, as in W. crispula, Hedw. hitherto unknown to 

 Ireland. 



6. W. tenuirostris, HOOK, et TAYLOR. Stems loosely tufted ; 

 leaves linear, acuminate, flexuose, their margins plane and 

 waved, crisped when dry ; capsule cylindrical-ovate, slightly 

 inclined ; lid rostrate as long as the capsule. Muse. Brit. ed. 

 2, p. 83. Supp. Tab. 3. 



