Hypnum.-} D I PL O PERI ST O MI. 153 



Schwaegr. Suppl. v. 1. P. //. p. 194. Am. Disp. Muse. p. 58 

 Dill Muse. t. 40. / 44. B. C. D. 



Hypnum trichopodium, longifolium, obscurum, laxum ? and Sipho. 

 Brid. Meth. (according to Mr. Arnott.J 



HAB. Banks of rivers, and in spots occasionally over- 

 flowed. 



Stems from four to five inches in length. Colour dirty yel- 

 low-green. 



4. H. undulatum ; leaves ovate acute transversely undulated with 



two faint nerves at the base, capsule oblong furrowed arcuato- 

 cernuous, lid rostrate. (TAB. XXIV.) 



Hypnum undulatum. Linn. Sp. PI. p. 1589. Turn. Muse. Hib. 

 p. 154. Smith, Fl. Brit. p. 1294. Engl Bot. t. 1181. Moug. et 

 Nestl n. 45. Hook. Fl Scot. P. II. p. 141. Funck, Deutschl Moose, 

 t. 37. / 3. Hobson, Brit. Mosses, v. 1. n. 68. Drummond, Muse. 

 Scot. v. 1. n. 75. Brid. Meth. p. 156. Schwaegr. Suppl v. 1. P. II. 

 p. 197. Arn. Disp. Muse. p. 59. Dill Muse. t.35.f. 11. 



HAB. In woods and dry heathy places. 



This fine species, which is often four or five inches in length, 

 differs most strikingly from the rest of the genus by its peculiar 

 habit, its white membranaceous and undulated leaves ; and still 

 more remarkably from all its British congeners by its furrowed 

 capsules, giving it the same relation with the Hypna as Mnium 

 bears to Bryum ; and it might with equal propriety be 

 separated. 



5. H. denticulatum; leaves ovate sometimes approaching to lan- 



ceolate more or less acuminated having two short nerves at 

 the base, capsule oblongo-cylindraceous inclined, lid conical. 

 (TAB. XXIV.) 

 a. angustifolium ; leaves ovato-lanceolate, distant, quite plane. 



Hypnum denticulatum. Linn. Sp. PI p. 1588. Hedw. St. Cr. v. 

 4. t. 31. Turn. Muse. Hib. p. 148. t. 12. / 1. Smith, Fl Brit. p. 

 1288. Engl Bot. t. 1260. Moug. et Nestl n. 46. Hook. Fl. Scot. 

 P. II. p. 141. Funck, Deutschl Moose, t. 37. / 1. Hobson, Brit. 

 Mosses, v. 1. n. 67. Drummond, Muse. Scot. v. 1. n. 74. Brid. Meth. 

 p. 153. Schwaegr. Suppl v. 1. P. II. p. 187. Arn. Disp. Muse. p. 

 58. 



Hypnum sylvaticum. Moug. et Nestl n. 515. Funck, Deutschl. 

 Moose, t. 37. /. 2. Brid. Meth. p. 153. Schwaegr. Suppl v. 1. P. 



II. p. 182. t. 82 Dill Muse. t. 34. /. 5. 



/3. obtusifolium ; leaves ovate, more or less obtuse, slightly concave. 



