Hypnum.} MUSCI. 39 



cumbent, somewhat caespitose, from two to three inches long-, variously 

 branched, at length denuded. Leaves loosely imbricated, concave, at 

 the tops of the shoots sometimes, but never remarkably secund ; 

 their nerve not only percurrent, but running out into a mncro, very 

 stout, of a reddish-brown colour ; the margins of the leaves can 

 scarcely be said to be reflexed. The H, fluviatile of Funcke's 

 Deutsch, Moose appears to be H. serpens. 



* * Leaves serrated. 



10. H. populeum, HEDW. Leaves erect, lanceolate, acumi- 

 nated, serrated, their margins slightly reflexed, their nerve per- 

 current; capsule ovate, subcernuous; lid conical. Hedw. Sp. 

 Muse. t. 70, /. 16. Muse. Brit. ed. 2, p. 157, t. 24. 



On stones ; common. 



b. Nerve shorter than the leaf or none. 



* Leaves entire. 

 f Leaves ovate or elliptical. 



11. H. stramineum, DICKS. Leaves loosely imbricated, 

 erecto-patent, oblongo-ovate, obtuse, entire, shining, their nerve 

 reaching half way ; capsule oblongo-ovate, curvato-cernuous ; 

 lid conical. Dicks. Cr. Fasc. I. t. I,/. 9. Muse. Brit. ed. 2, 

 p. 160,*. 24. 



In bogs ; common. The fruit very rare ; on sandy banks of the 

 river at Castle Kelly Glen, near Dublin. Upon comparing Dr. 

 Wahlenberg's specimens of H. trifarium of Weber and Mohr, I 

 cannot find in them any precise marks of difference from our plant ; the 

 leaves vary in both as to compactness of insertion ; the lurid colour of 

 the former I find equally deep in some shoots of the latter, having also 

 leaves not more concave on some of the branches. 



12. H. demissum, WILSON. Stems procumbent, with a few 

 slender branches, leaves erect, subsecund, elliptic-lanceolate, 

 acute, nerveless, entire, their margins recurved ; capsule 

 elliptical, arcuato-cernuous ; lid rostrate. Wils. in Eng. Bot. 

 Supp. f. 2740. 



On large stones in the wood at Cromaglown, near Killarney, Mr. W. 

 Wilson. In the wood five miles nearer to Kenmare. The tufts of a 

 pale shining yellowish-green ; and the slender capsules, with wide 

 mouths, so remarkable in a dried state, render the moss easily recog- 

 nised. The seta are slender, elongated, and smooth. 



13. H. murale, HEDW. Leaves nearly erect imbricated 

 oval, concave, acuminulated, their nerve not percurrent; cap- 

 sule ovate, cernuous; lid rostrate. Hedw. St. Cr. v. 4, t. 30. 

 Muse. Brit. ed. 2, p. 161, t. 24. 



On walls and stones ; not uncommon. 



14. H. purum, LINN. Leaves closely imbricated, oval, acu- 

 minulate, very concave, their nerve reaching half way up ; cap- 



