Dicranum.'} APLOPERISTOMI. 99 



gins slightly undulated serrated rather obtuse pointing in 

 all directions, capsule ovate subcernuous, lid rostrate. (TAB. 

 XVII.) 



Dicranum pellucidum. Swartz, Muse. Suec. p. 35. Turn. Muse. 

 Hib. p. 68. Smith, Fl Brit. p. 1223. Engl Bot. t. 1346. Moug. et 

 Nestl. n. 122. Schwaegr. Suppl. v. 1. p. 181. t. 48. Hobson, Brit. 

 Mosses, v. I. n. 40. Drummond, Muse. Scot. v. 1. n. 42. Brid. Meth. 

 p. 62. Hook. Fl. Scot. P. II. p. 133. Am. Disp. Muse. p. 30. 



Bryum pellucidum. Linn. Sp. PL p. 1583 DM. Muse. t. 46. / 23. 



HAB. On wet sides of streams and rivers. 

 The more ovate, short, somewhat truncate and decidedly in- 

 clined capsules, furnish the principal distinction between this 

 plant and D. flavescens. 



18. D. spurium; stems elongated, leaves ovate concave erecto- 



patent directed to every side the superior ones lanceo- 

 late serrulate, capsule oblong curved, lid rostrate. (TAB. 

 XVII.) 



Dicranum spurium. Hedw. St. Cr. v. 2. t. 30. Smith, Fl. Brit. p. 

 1222. Schwaegr. Suppl v. 1. p. 179. Brid. Meth. p. 65. Moug. et 

 Nestl. n. 319. Funck, Deutschl. Moose, t. 20. n. 16. Hook. Fl. Scot. 

 P. II. p. 133. Arn. Disp. Muse. p. 30. 



Bryum spurium. Dicks. 



HAB. In bogs, Yorkshire; Mr. Teesdale. Kinnordy, 



Scotland ; Mr. Lyell ; always barren. 



This singular species, somewhat allied to D. scoparium, D. 

 undulatum, and the continental D. Schraderi, differs from them 

 all in the breadth of the leaves, most of which are ovate, the 

 upper ones being longer and narrower, and serrated at the 

 points. The teeth of the peristome of this, as well as some 

 other species of this genus, will not always be found to be 

 divided into two segments only ; very frequently three divisions 

 are apparent. 



19. D. crispum; stems short, leaves from a sheathing base setace- 



ous nearly distichous flexuoso-recurved crisped when dry, 

 capsule ovate erect, lid with a long beak. (TAB. XVII.) 



Dicranum crispum. Hedw. St. Cr. v. 2. t. 33. Turn. Muse. Hib. 

 p. 65. Smith, Fl. Brit. p. 1207. Engl. Bot. t. 1151. Schwaegr. 

 Suppl. v. 1. p. 179. Brid. Meth. p. 64. Drummond, Muse. Scot. v. 1. 

 n. 38. Hook. Fl. Scot. P. II. p. 133. Hobson, Brit. Mosses, v. 2. . 

 34. Funck, Deutschl Moose, t. 20. n. 19. Arn. Disp. Muse. p. 33. 

 G2 



