Hypnum.] MUSCI. 37 



On sides of streams ; Dunscombe's wood, near Cork, Mr. James 

 Drummond. At O'Sullivan's Cascade and Turk Waterfall, near 

 Killarney, Mr. W. H. Harvey. Having seen, since the publication 

 of the second edition of Muse. Brit., states of this plant at Turk 

 Waterfall with the colour quite as pale, the texture of the leaves as 

 thin, their reticulations quite as large, as in Jamaica specimens of 

 Hedvvig's plant, assured to me by Dr. Schwaegrichen ; and on the 

 other hand, having seen states of the Jamaica moss fully as green as 

 ours, I apprehend it is time to unite them ; a step, however, which, I 

 confess, should be taken with great caution, as it bears so remarkably 

 on the geographical distribution of the mosses. 



3. H. splachnoides, HOOKER. Shoots erect, somewhat fasti- 

 giate ; leaves imbricated on all sides, erect, oblongo-lanceolate, 

 their nerve almost percurrent. Hook. Eng. FL v. 5, part I 9 p. 

 74. Daltonia splachnoides. Muse. Brit. ed. l,p. 90, ed. *2,p. 139, 

 t. 22. 



Secawn mountain, near Dublin. On Turk Mountain, and in Cro- 

 maglown, near Killarney, Mr. W. Wilson. Tufts small ; stems of 

 the past season procumbent, of the present erect, about half an inch in 

 height ; the leaves loosely imbricated. Setce, usually numerous, closely 

 set in the tuft. Capsule with an apophysis, reticulated, turbinate, 

 slightly inclined. Peristome nearly as long as the capsule ; teeth of 

 the exterior pale, lanceolate-setaceous ; the inner united at the base 

 by a membrane scarcely rising above the mouth of the capsule. This 

 species ranges very badly under Hookeria. The fastigiate setce re- 

 mind one of the Trichostoma, If the circumstance of a calyptra 

 being dimidiate or entire be now allowed by all muscologists to be of 

 sufficient importance to separate genera, how much more should the 

 singular calyptra of this moss avail ? In other genera the base of the 

 calyptra has a torn appearance, but here it is divided into capillary 

 processes, nearly as long as the calyptra above ; all equally long, 

 equally broad, pellucid, and without joints or cells. Another singu- 

 larity consists in the base of the perichcetium, as in certain of the 

 genus Fissidens of Hedwig, throwing out its own rootlets. 



35. HYPNUM. Linn. 



Seta lateral. Peristome double : the outer of 16 teeth ; the 

 inner of a membrane cut into 16 equal segments, with filiform 

 processes frequently interposed. 



I. Shoots plane. 

 A. Capsules erect. 



1. H. trichomanoides, SCHREBER. Leaves broadly scymitar- 

 shaped, serrated, their nerve reaching to their middle ; capsule 

 ovate; erect; lid rostrate. Schreb. Flor. Lips. p. 88. Muse. 

 Brit. ed. 2, p. 152, *. 24. 



On trees ; common. 



2. H. complanatum, LINN.EUS. Leaves oblong apiculate, 

 entire, nerveless ; capsule ovate, erect ; lid rostrate. Linn. sp. 

 pi. p. 1588. Muse. Brit. ed. '2, p. 152, t. 24. 



On trees ; common. 



