Bryum.-} D I P L O PER I S T O M I. 207 



very alpine situations, and in the latter country only amongst 

 the Breadalbane range of mountains. 



Our reasons for not retaining this plant "either in the genus 

 Meesia or Timmia, are given in the Exotic Flora ; the capsule, 

 however, we must allow, has much the habit of the other 

 Hedwigian Meesice. The outer peristome is equal in length to 

 the inner one, and the latter has the ciliary processes standing 

 in pairs and united by transverse bars. 



f f Leaves with their margins evidently thickened. 

 Leaves without denticulations. 



21. B. punctatum; stems elongated, leaves obovato-rotundate very 

 obtuse reticulated their margins thickened entire the nerve 

 disappearing below the point, capsule ovate pendulous, lid 

 shortly rostrate. (TAB. XXX.) 



Bryum punctatum. Schreb. Fl. Lips. p. 85. Turn. Muse. Hib. p. 

 132. Smith, FL Brit. p. 1368. Engl. Bot. t. 1183. Moug. et Nestl 

 n. 136. Hook. Fl. Scot. P. II. p. 151. Hobson, Brit. Mosses, v. 1. n. 

 104. Drummond, Muse. Scot. v. 2. n. 93. Brid. Meth. p. 119. Arn. 

 Disp. Muse. p. 4-5. 



Bryum ellipticum. Beauv. Brid. Meth. p. 119. 

 Mnium punctatum. Hedw. Funck, Deutschl. Moose, t. 33. f. 16. 

 Mnium serpyllifolium. . Linn. Sp. PI. p. 1577. Dill. Muse. t. 53. 

 f.Sl. 



HAB. Boggy places, particularly among the roots of 



Alders, and other marsh trees. 



The leaves of this moss are among the largest in the Order 

 Musci, and approaching nearly to those of Cinclidium stygium. 

 The present and all the following species of Bryum agree in 

 having the inner peristome of a firm and rigid texture, while 

 the outer teeth are prominent. 



Leaves denticulated. 



22. B. ligulatum ; stems elongated, leaves undulate ligulate reti- 

 culated their margins thickened denticulate the nerve reaching 

 a little beyond the point, capsule ovate pendulous, lid conical. 

 (TAB. XXX.) 



Bryum ligulatum. Schreb. Fl. Lips. p. 84-. Smith, FL Brit. p. 



