Hypnum.} MUSCI. 43 



percurrent, those of the stem ovato-acuminate, striated, those of 

 the branches ovato-lanceolate ; capsule cylindraceous, inclined ; 

 lid conical. Linn. sp. pi. p. 1591. Muse. Brit. ed. 2, p. 174, 

 t. 25. 



On the sands at Portmarnock, near Dublin ; rare. 



34. H. crassinervium, MSS. Branches simple, thickly set, 

 erect; leaves patent widely ovate, acuminate, concave, serrated, 

 their margins reflexed, nerved to the middle ; capsule ovate, 

 cernuous; seta rough ; lid rostrate. Wils. in Eng. Bot. t. 2706. 

 Hook. Eng. Flor. v. 5, part l,p. 88. 



On limestone, near Cork, 1820. At Mucruss, near Killarney, in 

 fruit, Mr, W. Wilson. Common at Dunkerron. I was induced to 

 give this Hypnum the specific name of crassinervium, from the re- 

 markable thickness of the nerve of the leaf, which, as if it were the 

 union of two nerves, is often disposed to bifurcate even half way up 

 the leaf, which I have not observed in others of the genus. 



35. H. rutabulum, LINN. Leaves patent, ovate, acuminate, 

 serrated, striated, nerved half way ; capsule ovate, cernuous ; 

 seta rough ; lid conical. Linn, sp.pl. p. 1590. Muse. Brit. ed. 2, 

 p. 176, t. 26. 



On banks, stones, and trees ; common. A variety occurs on the 

 sands at Portmarnock, near Dublin, with the leaves very broadly 

 cordate and with long acuminated hair-like points, their margins broadly 

 reflexed : perhaps if the fruit were found it might prove a distinct 

 species. 



36. H. velutinum, LINN. Leaves erecto-patent, ovate, or 

 ovato-lanceolate, acuminate, serrated, striated, nerved half way; 

 capsule ovate, cernuous; seta rough ; lid rostrate. Linn, sp, pi, 

 p. 1595. Muse. Brit.ed. 2, p. 177, t. 26. 



On banks, stones, and trees ; common. Very nearly allied to the 

 preceding ; but of a smaller size, and with narrower, more erect 

 leaves. 



37. H. ruscifolium, NECKER. Leaves loosely imbricated, 

 subpatent ; broadly ovate, acute, serrated, concave, their nerve 

 not quite percurrent; capsule ovate, cernuous ; seta smooth; lid 

 rostrate. Neck. Metk. Muse. p. 181. Muse. Brit. ed. 2, p. 177, 

 t. 26. 



On stones, and occasionally immersed in water ; common. 



38. H. striatum, SCHREBER. Leaves patent cordate, acumi- 

 nate, serrated, striated, nerved more than half way up ; capsule 

 oblongo-ovate, cernuous ; seta smooth ; lid rostrate. Schreb. 

 Fl. Lips. p. 91. Muse. Brit. ed. 2, p, 177, t. 26. 



Woods, on the ground ; common. 



39. H. confertum, DICKSON. Leaves erecto-patent, ovate 

 acuminate, concave, serrated, nerved half way ; capsule ovate, 

 cernuous ; seta smooth ; lid rostrate. Dicks. Cr. Fasc, 4, t. 11, f. 

 4. Muse. Brit. ed. 2, p. 178,*. 26. 



