Hypnum.-\ D I PL O PERI S T OML 185 



closely set, shorter, broader, more concave and more obtuse 

 leaves, with the margin more reflexed, quite entire, the nerve 

 broader, of the same colour as the leaf, disappearing below the 

 point; besides all which, the texture of the leaves is thicker 

 and softer, with distinct cellules ; whereas in H. filicinum they 

 are somewhat scariose. 



57. H. palustre ; leaves secundo-ovate somewhat acuminate con- 



cave entire margins incurved above the nerve short often 

 forked sometimes obsolete, capsule oblongo-ovate cernuous, 

 lid conical. (TAB. XXVI.) 



Hypnum palustre. Linn. Sp. PI. p. 1593. Turn, Muse. Hib. p. 

 191. Smith, Fl. Brit. p. 1329. Engl Bot. t. 1655. Schwaeyr. 

 Suppl v. 1. P. //. p. 292. Brid. Meth. p. 181. Hook. Fl. Scot. P. 

 II. p. 147. Hobson, Brit. Mosses, v. 1. n. 88. D?'ummond, Muse. 

 Scot. v. 2. n. 80. Funck, Deutschl. Moose, t. 50. /. 70. Am. Disp. 

 Muse. p. 67. 



Hypnum luridum. Hedw. St. Cr. v. 4. t. 38. 



Hypnum fluviatile. Turn. Muse. Hib. p. 192. Engl Bot. t. 1303. 

 (not Hedw.) 



Hypnum palustre. Moug. et Nestl. n. 521. and H. salebrosum? n. 

 428. 



Hypnum subsphaerocarpum. Funck, Deutschl. Moose, t. 53. f. 84. 



Hypnum adnatum. Turn. Muse. Hib. p. 165. Engl. Bot. t. 2406. 

 (not Hedw.) Dill Muse. t. 37. /. 27. 



HAB. Banks of rivers and standing waters, and on wet 



rocks, abundant. 



Variable as is this species, we trust that it will be found 

 constant to the above characters. The plant, or at least its 

 main stems, is usually upright, thickly crowded, the leaves 

 flaccid, varying from a deep lurid green, the most common tint, 

 to a bright and pale yellow in some situations. The nerve is 

 sometimes obsolete, rarely half the length of the leaf, more 

 frequently forked or double. Dr. Stokes' specimens of H. jftu- 

 viatile, figured in EngL Bot. are H. palustre ; and we do not 

 know that the true fluviatile has ever been found in Britain. 

 Such is the case also with the H. adnatum of EngL BoL The 

 true H. qdnatum has a differently shaped leaf, and is, we believe, 

 altogether an American plant. 



58. ILfluitans; leaves loosely imbricated the upper ones especially 



falcato-secund all of them lanceolate- subulate scarcely ser- 



