112 HYPNUM. 



tmcinate leaves and brighter colour, together with theif I 

 striation and serratures, abundantly distinguish this from! 

 H. aduncum and all its affinities. 



54. H. rugulosum ; leaves secund, ovato-lanceolate, serrated^l 

 nearly plane, crisped transversely when dry, margins re-j 

 curved, nerve reaching halfway. (TAB. XXVI.) 



H. rugulosum. Web. et Mohr Fl. Crypt. Germ. p. 366. Moug. eti 

 Nestl. n. 231. H. rugosum. Hedw. Sp. Muse. p. 293. Hcdw. St. Cr.l 

 v. 4. t. 23. / A. (leaf only.) Schwaegr. Suppl pars 2. p. 301. 



HAB. On the ground in heathy places in Norfolk. Mr. I 

 Eagle. 



Plant from two to four inches in length, creeping in dense! 

 tufts upon the ground, of a yellow green colour, often bor-l 

 dering on brown. The transverse undulations are pecu- 

 liarly striking, even to the naked eye, in which particular, 

 as well as in the broader and shorter, more plane, secund 

 but not falcate leaves, it differs from all the varieties of 

 H. aduncum. Its fructification, we believe, has never been 

 found in any country. 



55. H. commutatum ', stems pinnated; leaves falcato-secimd,j 

 cordate, very much acuminated, serrated, their margins re- 

 flexed, nerve disappearing below the summit ; capsule ob- 

 longo-ovate, curved, cernuous ; lid conical. (TAB. XXVII.) 



H. commutatum. Hedw. St. Cr. v. 4. t. 26, Turn. Muse. Hlb.\ 

 p. 196. Engl. Bot. t. 1569. Dill Muse. t. 36. f. 19. 



HAB. Wet places, particularly in a calcareous soil. 



Besides the characters we have pointed out under H.Jili-\ 

 cmum to distinguish that and the present species, we may 

 add that this is much the largest, far less rigid in the stems 

 and leaves, and of a paler and greener colour. The leaves 

 are likewise (for want of the excurrent nerve) disposed to ; 

 be curved, and to become twisted when dry. 



B. Leaves destitute of a nerve, or furnished with two very in-: 

 distinct ones at the base. 



56. H. scorpioides ; leaves secund, broadly ovate, ventricose, ! 

 obtuse, entire, nerveless ; capsules oblongo-ovate, curved, 

 cernuous; lid conical. (TAB. XXVII.) 



H. scorpioides. Linn. Sp. PL p. 1592. Hedw. Sp. Muse. p. 295. 

 Schwaegr. Suppl. t. 95. Turn. Muse. Hib.p. 187. Engl. Bot. t. 1039. 



HAB. Bogs. 



This, which is one of the largest of the British mosses, 

 is at once distinguished from its affinities by its obtuse and 

 nerveless leaves. Schwaegrichen has represented his mag- 



