98 HYPNUM. 



H. murale. Hedw. St. Cr. v.4. t. 30. Die**.- Turn. Muse. Hti, 

 p. 166. Moug. et Nestl n. 145. H. confertum. Engl Bot. t. 1038, 

 H. abbreviatum. Hedw. Sp. Muse, t, 65. f. 1-4. Dill. Muse. t. 41. 

 f.52. 



HAB. On walls and stones. 



The rostrate lid and concave, shortly pointed leaves well 

 distinguish this species from its affinities. 



I?. H. purum; leaves closely imbricated, oval, with a V( 

 short point, very concave, their nerve reaching half waj 

 up ; capsule ovate, cernuous, lid conical. (TAB. XXIV.) 

 H. purum. Linn~Sp. PL p. 1594. Hedw. Sp. Muse. t. 66. /.c 

 Turn. Muse. Hib. p. 175. Engl. Bot. t. 1599. Moug. et Nestl. n. 

 H. illecebrum. Smith Fl. Brit, and Engl. Bot. t< 2189. (not of Hedw.} 

 DilLMtisc. J.40./.45. 



The less regularly pinnate state of this plant has been 

 taken by English authors for the H. illecebrum of Hedwig, \ 

 an American plant, and a distinct species ; having leaves j 

 with more acuminated and serrated points j and a longer and j 

 more decided nerve. 



f f Leaves lanceolate or subulate* 

 +- Leaves without striae. 



18. H.fluitans; leaves loosely imbricated, the upper ones fal- ) 

 cato-secund, all of them lanceolato-subulate, scarcely ser- 

 rated at their points ; their nerve reaching more than half \ 

 way ; capsule ovato-oblong. curved, cernuous, lid conical* I 

 (TAB. XXIV.) 



H. fluitans. Linn. Fl Suec. ed. 2. p. 399. Hedw. St. Cr. v. 4. t. 36. 1 

 Turn. Muse. Hib. p. 182. Engl. Bot. t. 1448. Dill Muse. t. 3S./.33, j 

 HAB. In pools and streams of water ; rarely fructifying 

 but in places that are only occasionally inundated. 



Stems often a span long. Colour varying from a pale ; 

 green to a deep purple in alpine rivulets. It is almost; 

 doubtful under which section this species should be ar-1 

 ranged, as it might with equal propriety have come under' 

 that with the " leaves falca to- sccund," where indeed Mohrj 

 has already placed it. 



19. H. plumosum; leaves erecto-patent, the upper ones some-; 

 times secund, all of them ovato-lanceolate, acuminated, 

 subserrated, the nerve reaching above half way; capsule 1 

 ovate, cernuous ; lid conical. (TAB. XXV.) 



H. plumosum. Linn. Sp. PL p. 1592. (not of Hedw.') Turn. Muse, 

 Hib. p. 172. t. 15. f. 1. Engl. Bot. .2071. H, pseudo-plumosum.: 

 Brid. H. alpinum. Turn. Muse. Hib. p. 192. Engl. Bot. t. 1496. 

 H. flageilare. Hedw. Sp. Muse. t. 73./. 1-3. (not of Dicks.) 



