Dicranum.-} APLOPERISTOML 87 



it grows, whether micaceous schistus, as at the Dargle, county 

 of Wicklow, or sandstone, as in the south of Ireland, or on 

 calcareous rocks, as at Aberdour, and Glen Tilt. The leaves 

 are very plane, straight, erect, and almost appressed, and cellu- 

 lar in structure. 

 19. W. acuta ; stems branched, leaves subulato-setaceous subse- 



cund rigid canaliculate, capsule turbinate, lid rostrate. (TAB. 



XIV.) 



Weissia acuta. Hedw. St. Cr. v. 3. t. 35. Hobson, Brit. Mosses, v. 

 2. n. 31. Schwaegr. Suppl. v. I. p. 69. Brid. Meth. p. 47. Funck, 

 Deutschl. Moose, t. 9. n. 11. Moug. et Nestl. n. 610. Drummond, Muse. 

 Scot. v. l.n. 30. Am. Disp. Muse. p. 26. Hook. Muse. Scot. P. II. 

 p. 131. 



Grimmia acuta. Turn. Muse. Hib. p. 29. Smith, Fl. Brit. p. 1192. 

 Engl Bot. t. 1644. 



Weissia rupestris. Hedw. Sp. Muse. t. 14. 

 Bryum acutum. Dicks. 



Bryum splachnoides. Dicks DHL Muse. t. 47. /. 34. 

 HAB. Rocks in alpine countries. 



The leaves are remarkably rigid, and the capsule has a swell- 

 ing at the base, resembling an apophysis. The whole plant 

 varies much in size, and is, as Mr, Turner has noticed, of a 

 shining brownish-green colour. In the former edition of this 

 work, we had erroneously conceived that Dicranum fulvellum 

 was the same as this moss, and had, therefore, added it as a 

 synonym. 



XVIII. DICRANUM. 



GEN. CHAR. Fruitstalks terminal ; (except in D. adiantoides, 

 and D. taxifolium.} Peristome single, of 16 bifid, equi- 

 distant teeth ; Calyptra dimidiate. (TAB. II.) 



It is much to be regretted that this genus, including so great a 

 number of species, and those frequently so anomalous in appear- 

 ance, cannot be divided without departing from the principles now 

 generally adopted by muscologists. The Fissidentes of Hedwig 



possess so remarkable a character in the form, structure, and di- 



F 4 



