Hypwnx.] MUSCI. 41 



acuminate, entire or scarcely subserrulated, their nerve not per- 

 current ; capsule ovato-cylindraceous ; seta rough ; lid conical. 

 Linn. sp. pi. p. 1595. Muse. Brit. ed. 2, p. 165, t. 25. 

 On rocks, walls, and trunks of trees ; common. 



22. H. salebrosum, Hoffm. Leaves erecto-patent, lanceolate, 

 acuminated into a waved hair-like point, subserrulate, their 

 nerve not percurrent ; capsule ovate, cernuous ; seta smooth ; 

 lid conico-acuminate. Hoffm. Fl. Germ.v. 2, p. 74. Muse. Brit, 

 ed. 2, p. 166, Supp. t. 5. 



On stones, at Lough Bray. Tufts of a yellowish-green colour ; the 

 leaves flaccid, tapering to a very long point. 



23. H. lutescens, Hudson. Leaves erecto-patent, lanceolate, 

 acuminated, entire, striated, their nerve not quite percurrent ; 

 capsule ovato-cernuous; seta rough; lid shortly rostrate. Huds. 

 Fl. Ang. ed. 1, p. 421. Muse. Brit. ed. 2, p. 166, t. 25. 



On trees at Newington, County Kildare ; sands of Portmarnock, 

 near Dublin. The inner peristome is allied to that of Hypnum 

 dendroides, Climacium of Web. et Mohr. 



24. H. albicans. Necker. Leaves erect, ovato -lanceolate, 

 acuminated, faintly striated, concave, entire, revolute at the mar- 

 gin, their nerve reaching half way up ; capsule ovate, cernuous ; 

 seta smooth ; lid conical. Neck. Meth. Muse. p. 180. Muse. Brit, 

 ed. 2, p. 167, t. 25. 



On the sands at Portmarnock, near Dublin ; not rare. 



* * Leaves serrated. 



f Stems denuded below, f Tree-like. J 



25. H. alopecurum, Linn. Stems erect, unbranched and 

 naked below, branches fascicled above ; leaves concave narrow 

 ovate, acute, serrated, refiexed at the margin, the nerve not 

 quite percurrent ; capsule ovate cernuous ; lid rostrate. Linn, 

 sp.pl. p. 1594. Muse. Brit. ed. 2, p. 168, t. 25. 



In woods, and on shady banks ; common. 



26. H. dendroides, Linn. Stems erect, unbranched and 

 naked below, branches fascicled above ; leaves ovate or ovato- 

 lanceolate, serrated, their nerve not quite percurrent ; capsule 

 erect, ovato-cylindraceous; lid rostrate. Linn, sp.pl. p. 1593. 

 Muse. Brit. ed. 2, p. 168, t. 25. 



On wet banks. 



f f Stems leafy below. 

 -j- Capsules erect. 

 26. H. curvatum, Swartz. Branches fascicled, curved ; 

 leaves ovato-elliptical, concave, serrated, the nerve not percur- 

 rent ; capsule ovate, erect ; lid rostrate. Swartz. 31usc. Suec. p. 

 64. Muse. Brit. ed. 2, p. 169, U 25. 

 On trees and rocks ; very common. 



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