104 APLOPERISTOMI. [Trichostomum. 



Dicranum ful vellum. Smith, FL Brit. p. 1209. Engl Bot. t. 2268. 

 Grev. Scot. Crypt. FL t. 188. (excellent.) Arn. Disp. Muse. p. 32. 

 Bryum fulvellum. Dicks. Crypt. Fasc. 4. t. 11. f. 1. 

 Dicranum rupestre. Web. et Mohr. 

 Dicranum Seligeri. Brid. Meth. Muse. p. 59. 

 HAB. Crevices of rocks, Ben More. Mr. Dickson. Ben 

 Nevis. Mr. JBorrer. Ben Lawtrs. Drs. Hooker and 

 Greville. Not uncommon on the Clova mountains. 

 Mr. Drummond. 



This moss has so completely the habit of Weissia acuta that 

 we were erroneously led to refer it to that plant in the first 

 edition of this work. Subsequent observations have convinced 

 us of our error. The peristome is very large, bright red, bifid, 

 or cut into lacinise of various lengths, and sometimes perforated 

 with clefts. 



XIX. TRICHOSTOMUM. 



GEN. CHAR. Fruitstalks terminal; Peristome of 16 equal 

 teeth divided to the base, or 32 placed together in 

 pairs; Calyptra mitriform. (TAB. II.) 



We need only repeat here what we have already said under 

 the genus Grimmia, that it, and the present one are very closely 

 allied, both in natural and essential character. Trichostomum 

 is to Didymodon, what Grimmia is to Weissia. 



* Fruitstalks curved. 



1. T. patens ; stems elongated, leaves lanceolate acuminated cari- 

 nated their margins recurved more or less piliferous, capsule 

 oblongo-ovate, fruitstalks curved, lid conical. (TAB. XIX.) 

 . majus ; leaves suberect, rather rigid, destitute of hair points. 



Trichostomum patens. Schwaegr. Suppl. v. 1. p. 152. t. 37. Moug. 

 et Nestl n. 214. Hook. Fl. Scot. P. II. p. 134. Hobson, Brit. Mosses, 

 v. 2. n. 37. Drummond, Muse. Scot. v. 1. n. 43. Funck, Deutschl. 

 Moose, t. IS. n. 16.? Arn. Disp. Muse. p. 22. 

 Campylopus patens. Brid. Meth. p. 73. 



