Gymnostomum.'] GYMNOSTOMI. 25 



Scot. P. II. p. 123. Hobson, Brit. Mosses, v. 2. n. 12. Drummond, 

 Muse. Scot. v. 2. n. 11. Nees et Hornsch. Bryol. Germ. v. 1. p. 151. . 

 10./. 14. J3nW. Meth. p. 13. ^4rn. Disp. Muse. p. 11. 

 G. paucifolium. .Engrf. Bof. f. 2506. 

 Dicranum cylindricum. Smith, Fl. Brit. p. 1221. 

 Bryum paucifolium. Dicks. Crypt. Fasc. 4. t. 11. f. 3. 

 HAB. On sandstone rocks, rare. 



The present species is remarkable in having two kinds of 

 leaves, of which the outer or lower ones are much the short- 

 est and broadly lanceolate, whilst the inner and uppermost are 

 linear-lanceolate ; both kinds are nearly plane, very obtuse at 

 the point. The capsule is cylindrical, and the lid conical and 

 somewhat acuminated, in which particular it seems to diifer from 

 the Gymnostomum gracillimum of Nees et Hornschuch. 

 14. G. Donianum; stem scarcely any, leaves subulate, capsule 

 turbinate. (TAB. VII.) 



Gyrnnostomurn Domanum. Engl. Bot. t. 1582. Hobson, Brit. 

 Mosses, v. 2. n. 10. Drummond, Muse. Scot. v. 2. n. 10. Hook. Fl. 

 Scot. P. II. p. 123. Arn. Disp. Muse. p. 10. 



HAB. Sandstone rocks, Scotland. In the Den of Dupplin. 

 Mr. G. Don. Den of Airly, and at Norran Water. 

 Mr. Drummond. 



A very minute, delicate, and slender moss. The leaves quite 

 setaceous to the naked eye ; the seta, or fruitstalk, pale, as are 

 the capsule and the lid ; the former is exactly turbinate ; the 

 latter hemispherical with an acuminated point. The columella 

 is exserted as in some Splachna. 



G. Donianum seems to be entirely unknown upon the con- 

 tinent ; and even in Britain is, we believe, wholly confined to 

 the spots above mentioned ; where, however, it grows in great 

 profusion, clothing the surface of sandstone rocks to a consider- 

 able extent, as Weissia calcarea does the chalk cliffs in England. 

 15. G. microstomum; leaves broadly subulate, their margins in- 

 volute above the middle, flexuose crisped when dry, capsule 

 elliptical contracted at the mouth, lid subulate incurved. 

 (TAB. VII.) 



Gymnostomum microstomum. Hedw. St. Cr. v. 3. t. 30. Smith, 

 Fl. Brit. p. 1165. Engl. Bot. t. 2215. Schwaegr. Suppl. v. 1. p. 28. 

 Fnnck, Deutschl Moose, t. 4. n. 13. Slid. Meth. p. 15. Hook. Fl. 



