APLOPERISTOMI. 81 



HAB. Mountains of Clova, Scotland, in the crevices of 

 rocks, growing with Didymodon glaucescens, and Oxy~ 

 tropis campestris.' Mr. Drw/nmond^ 1824. 

 This valuable addition to the muscology of Britain has only 

 been seen in one spot, and even there it is far from being abun- 

 dant. In Switzerland, however, we have found it in great 

 plenty ; particularly in the famous Pass of the Gemini. It is 

 one of the most striking species of this genus, distinguished by 

 the superior size and great breadth of its leaves, which are as 

 closely imbricated as those of Bryum argenteum ; they are very 

 glossy, and their colour is a pale yellow green. The peristome 

 consists of 16, rather long and gradually attenuated, pale, yel- 

 low teeth, distantly striated. 



-t k- Leaves linear or subulate,. 



9. W. striata ; leaves linear denticulate crisped when dry, cap- 

 sule ovato-turbinate sulcate erect, lid obliquely subulate. 

 (TAB. XV.) 



a. minor j leaves linear-subulate, subserrulate. 



Weissia striata. Hooker and Tayl Muse. Brit. ed. 1. p. 45. Fl 

 Scot. P. II. p. 130. Am. Disp. Muse. p. 26. Drummond, Muse. 

 Scot. v. 1, p. 29. 



Grimmia striata. Schrad. Diar. Bot. v. 2. p. 57. Smith. Fl. Brit, 

 p. 1185. 



Weissia fugax. Hedw. Sp. Muse. t. 13. Schwaegr* Suppl. v. 1. p 

 77. Punch, Deutschl. Moose, t. 10. n> 20. Moug. et Nestl n. 407. 

 Weissia Schisti. Schwaegr. Suppl p. 72. t. 20. (not o/Engl Bot.j 

 Grimmia Schisti. Smith, Fl. Brit. p. 1185* 

 /;. major ; leaves broadly-linear, denticulate. 



Weissia denticulata. Schwaegr. Suppl. v. 1. p. 75. t. 19. Brid. 

 Meth. p. 40. Funck, Deutschl. Moose, t. 10. n. 19. 

 Weissia pumila. Brid. Meth. p. 39. 



HAB. Moist banks, and in the crevices of rocks in alpine 



countries. /?. very fine at rocks upon the Isla, Angusshire. 



The variety j8., the W. denticulata of Schwaegrichen, has 



the leaves strongly denticulate, and much broader than in the 



common appearance of W. striata z yet we have gathered so 



many specimens in intermediate states, that we cannot feel 



satisfied in considering them otherwise than as varieties. The 



F 



