Didymodon.~\ A P L O P E R I S T O M T. 119 



tions. Our larger plant is the Trichostomum linoides of Engl. 

 Bot. ; and this is of a much paler colour, as well as larger size, 

 than our smallest figures, taken from specimens gathered by our 

 friend Mr. Drummond, near Cork. 



9. D. capillaceum; stems elongated, leaves nearly distichous 

 subulato-setaceous, capsule erect ovato-cylindraceous, lid 

 conical. (TAB. XX.) 



Didymodon capillaceum. Schrad. Spicil. p. 64. Brid. Meth. p. 

 100. Hook. Fl. Scot. P. II. p. 136. Hobson, Brit. Mosses, v. 2. n. 

 42. Drummond, Muse. Scot. v. I. n. 52. Am. Disp. Muse. p. 36. 

 Svvartzia capillacea. Hedw. St. Cr. v. 2. t. 26. 



Cynontodium capillaceum. Hedw. Sp. Muse. p. 57. Funck, Deutschl. 

 Moose, t. 14. n. 4. 



Trichostomum capillaceum. Smith, Fl. Brit. p. 1236. Engl. Bot. t. 

 1152. 



Didymodon subulatum. Schkuhr, Deutschl. Moose r p. 65. t. 28. 

 Brid. Meth. p. 101. 



Didymodon distichum. Brid. Meth. p. 101. 



JBryum capillaceum. Dicks. Crypt. Fasc. 1. p. 4. t. 1. f. 6. 



HAB. On hanks in mountainous situations, abundant ; also 



upon walls, about Blair in Athol. 



Tliis species is most nearly allied to D. inclinatum of all the 

 British mosses, in general appearance. The stems, nevertheless, 

 are much longer, and the capsule erect and more slender ; and 

 when the peristomes are subjected to the microscope, they almost 

 seem to belong to different genera, so much narrower are the 

 teeth of the present species. Its stems vary exceedingly in 

 length according as the plant is found in wet or dry situations, 

 as do likewise the leaves which are sometimes short and rigid 

 in the D. subulatum of Schkuhr. 



10. D. keteromallum ; stems rather short, leaves subsecund subu- 

 late, capsule ovato-cylindraceous, lid conical. (TAB. XX.) 



Didymodon heteromallum. Hooker and Tayl. Muse. Brit. ed. 1. p. 

 68. Hook. FL Scot. P. II. p. 136. Hobson, Brit. Mosses, v. I. n. 49. 

 Drummond, Muse. Scot. v. 1. n. 51. Am. Disp. Muse. p. 36. Moug. 

 et Nestl n. 732. 



Weissia heteromalla. Hedw. St. Cr. v. I. t. 8. Schwaegr. Suppl. v. 

 1. p. 68. 



Grimmia heteromalla. Smith, Fl. Brit. p. 1194. Engl Bot. t. 1899. 

 Turn. Muse. Hib. p. 30. 



H 4 



