180 DIPLOPERISTOMI. {_Hypnum. 



HAB. Limestone rocks in Ireland. Chalky downs in Sus- 

 sex. Mr. Borrer. Near Edinburgh Dr. Greville. 



Without authentic specimens we cannot feel ourselves com- 

 petent to decide whether Mohr's H. clirysophyllum be our 

 plant ; though, if we were to judge from his description, we 

 could have but little doubt of their identity. Specimens sent by 

 Mohr, probably through a mistake, under the last mentioned 

 name, belong truly to H. stellatum. He has himself cautioned 

 us, that the two plants only differ in the presence or absence of 

 the nerve. "We have compared specimens of Hedwig's H. 

 polymorphum, and find them to accord precisely with our 

 plant; and hence we are enabled to detect the error of the 

 omission of the nerve in the figure above cited.* 



48. H. stellatum; leaves loosely set squarrose cordate much 



acuminated entire nerveless, capsule oblongo-ovate curved 



cernuous, lid conical. (TAB. XXVI.) 

 a. majus. 



Hypnum stellatum. Schreb. Fl. Lips. p. 92. Hedw. Sp. Muse. p. 

 280. Turn. Muse. Hib. p. 183. Smith, Fl. Brit. p. 1322. Engl 

 Sot. t. 1302. Moug. et Nestl n. 234. Schwaegr. Suppl. v.'3. t. 144. 

 Funck, Deutschl. Moose, t. 47. / 56. Hook. Fl. Scot. P. II. p. 146. 

 Hobson, Brit. Mosses, v. 2. n. 69. Drummond, Muse. Scot. v. 2. n. 76. 

 Arn. Disp. Muse. p. 66. 



Hypnum protensura. Brid.DiU. Muse. t. 39. f. 35. 

 ft. minus. 



Hypnum squarrulosum. Engl. Bot. t. 1709. 

 Hypnum polymorphum. Funck, Deutschl. Moose, t. 47. f. 59. 

 HAB. a. in marshes ; (3. on stone walls and rocks. 

 The larger variety of this plant is of a fine yellow brown 

 colour, and is not rare in fruit ; the smaller variety, which is 

 less upright, is of a greener tint, and has the leaves somewhat 

 more recurved. 



49. H. Halleri ; stems creeping with short erect branches, leaves 



broadly ovate acuminated serrated very obscurely and shortly 

 two-nerved their extremities remarkably recurved, capsule 

 oblongo-ovate cernuous, lid conical. ( SUPPL. TAB. V.) 



Hypnum Halleri. Linn. Diss. Meth. Muse. p. 34. Hedw. St. Cr. 

 v. 4. t. 21. Schwaegr. Suppl v. 1. P. II. p. 283. (excl. the syn. of H. 



* Mr. Arnott is disposed to consider H. polymorphum as a nerved variety of 

 H. stellatum ; in which, perhaps, after all, he is correct. 



7 



