Hypnum.-\ D I P L O P ER I ST O M I. 157 



also described as having " folia integerrima." Weber and Mohr 

 bring both these species next to H. serpens. 



Mr. Arnott considers H. radicale, (Schwaegr.) as identical 

 with this plant, and that there does not exist any good specific 

 difference between it and H. inordinatum, H. fragile, H. tenax, 

 (Hedw.) and H. orthocladon ? 



* * Leaves serrated. 



9. H. populeum ; leaves erect lanceolate acuminated serrated 



margin slightly reflexed, nerve reaching to the point, cap- 

 sule ovate subcernuous, fruitstalks rough, lid conical. (TAB. 

 XXIV.) 



Hypnum populeum. Hedw. Sp. Muse. t. 70. f. 1 6. Moug. et 

 Nestl. n. 519. Hook. Fl. Scot. P. II. p. 14-2. Hobson, Brit. Mosses, 

 v. 1. n. 69. Drummond, Muse. Scot. v. 1. n. 78. Brid. Meth. p. 172. 

 Funck, Deutschl. Moose, t. 42. /. 33. Arn. Disp. Muse. p. 65. 

 Schwaegr. Suppl. P. II. p. 238. 



Hypnum implexum. Swartz Turn. Muse. Hib. p. 173. t. 16. 

 Smith, Fl. Brit. p. 1310. Engl Bot. t. 1584. 



Hypnum petrophilum. Funck, Deutschl. Moose, t. 45. f. 46. 

 HAB. On trees and rocks. 



Mohr appears to us rightly to have united the Hypnum 

 implexum of Swartz and Turner to the Hedwigian H. populeum. 

 H. Starkii of Schleicher's Catalogue, if we may judge from 

 specimens sent by that Botanist to Mr. Turner, differs in no 

 particular from our plant; while Mohr describes his species 

 under that name as having a cordate base to the leaves, and 

 an evanescent nerve. 



10. H. reflexum; leaves cordato-acuminate serrated their nerve 

 reaching to the point their margin slightly reflexed, capsule 

 ovate cernuous, fruitstalks rough, lid conical. (TAB. XXIV.) 



Hypnum reflexum. Weber et Mohr. Fl. Crypt. Germ. p. 306. and 

 476. Schwaegr. Suppl. 3. t. 143. Brid. Meth. p. 170. Hook. Fl. 

 Scot. P. II. p. 142. Funck, Deutschl. Moose, t. 46. / 55. Arn. Disp. 

 Muse. p. 65. Schwaegr. Suppl. v. 2. p. 161. t. 143. 



HAB. On Ben Nevis, near the base of the mountain. 



On Ben Lawers. Dr. Greville. 

 We have compared our plants with those of the original 



