108 APLOPERISTOML [ Trichostomum. 



obtuse serrulated at the points their nerve vanishing before 

 the summit, capsule oblong, lid rostrate. (TAB. XIX.) 



Trichostomum aciculare. Pal. de Beauv. Prodr. p. 90. Moug. et 

 Nestl n. 22. Hook. Fl. Scot. P. II. p. 135. Schwaegr. Suppl. v. 1. 

 p. 156. Punch, Deutschl. Moose, t. 18. n. 19. Hobson, Brit. Mosses, v. 

 1. n. 45. Drummond, Muse. Scot. v. 1. n. 46. Am. Disp. Muse. p. 23. 

 Dicranum aciculare. Hedw. St. Cr. v. 3. t. 33. Turn. Muse. Hib. 

 p. 67. Smith, Fl. Brit. p. 1212. Engl. Bot. t. 1978. 

 Racomitrion aciculare. Brid. Meth. p. 80. 



Trichostomum riparium. Web. et Mohr. Schwaegr. Suppl. v. 1. p. 

 158. t. 39. Punch, Deutschl. Moose, t. 18. n. 20. 

 Racomitrion obtusifolium. Brid. Meth. p. 80. 



Racomitrion aquaticum. Brid. Meth. p. 80 Dill. Muse. t. 46. /. 

 25 and 26. B. 



HAB. In water, or on very wet rocks and stones. 

 This moss has the leaf singularly obtuse. The colour varies 

 from black, as it occurs in alpine rivulets, to yellowish green, 

 as it is found in less wet situations. A variety of this plant 

 with secund leaves bears some resemblance to Hypnum palustre. 

 We do not at all see upon what ground the T. riparium of 

 Weber and Mohr, and of Schwaegr. (t. 39.) is considered dis- 

 tinct from T. aciculare. 



7. T. fasciculare ; stems elongated branched, leaves lanceolate 



entire their summits never diaphanous their margins re- 

 curved, capsule ovato-oblong, lid rostrate. (TAB. XIX.) 



Trichostomum fasciculare. Schrad. Sp. p. 51. Schwaegr. Suppl. v. 

 1. p. 155. t. 38. Turn. Muse. Hib. p. 39. Smith, Fl Brit. p. 1243. 

 Engl. Bot. t. 2005. Moug. et Nestl. n. 215. Hook. FL Scot. P. II. p. 

 135. Drummond, Muse. Scot. v. 1. p. 47. Hobson, Brit. Mosses, v. 1. 

 n. 47. Am. Disp. Muse. p. 23. 



Racomitrion fasciculare. Brid. Meth. p. 80. 

 Bryum lutescens. Dicks. 



Bryum hypnoides. /3. Linn. Sp. PL p. 1585 Dill. Muse. t. 47. /. 

 28. and*. 46. / 26. C. 



HAB. On rocks in the mountains. 



The acute entire leaves, and brighter yellowish-green colour 

 of this plant distinguish it easily from the preceding. The want 

 of the diaphanous serrulate points keeps it apart from T. 

 caftescens and its allies. It is by no means a moss of uncom- 

 mon occurrence ; the stems are from one to three inches long. 



8. T. polyphyllum ; stems branched, leaves lanceolato-subulate 



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