92 APLOPERISTOMI. \_Dicmnwn. 



at the base of the fruitstalk by a scaly perichsetium, the leaves 

 of which exactly resemble the last, and which also throws out 

 roots from its base. Is it not possible that on the decay of 

 the fructification it may become a perfect plant or frond ? And 

 may not the perichaetium of D. adiantoides possess the same 

 property, whence the growth of the plant by frequent innova- 

 tions? Fissidens subbasilaris of Hedwig is hardly to be dis- 

 tinguished from this. 



B. Leaves inserted on all sides of the stem. 

 a. Leaves destitute of a nerve. 



4. D. glaucum; stems branched fastigiate, leaves erecto-patent 



ovato-lanceolate straight nerveless entire, capsule ovate 

 cernuous, lid rostrate. (TAB. XVI.) 



Dicranum glaucum. Hedw. Sp. Muse. p. 135. Schwaegr. Suppl. v. 

 1. p. 187. t. 48. Turn. Muse. Hib. p. 73. Smith, Fl. Brit. p. 1216. 

 Engl Bot. t. 2166. Moug. et Nestl. n. 23. Hobson, Brit. Mosses,' v. 1. 

 n. 36. Funck, Deutschl. Moose, t. 21. n. 26. Hook. FL Scot. P. II. p. 

 131. Am. Disp. Muse. p. 29. Brid. Metk. p. 66. 

 Dicranum albidum. Brid. Meth. p. 67. 



Bryum glaucum. Linn. Sp. PL Dill. Muse. t. 46. / 20. and t. 83. 

 /8. 



HAB. On bogs and wet heaths. 



This species is remarkable for its having the habit, and 

 nerveless reticulated leaves of a Sphagnum. The stems vary 

 considerably in length: American specimens are figured by 

 Dillenius, t. Ixxxiii. / 8. and it appears to be extensively 

 scattered over the globe. 



b. Leaves furnished with a nerve. 

 * Leaves apiculate or piliferous, 



5. D. latifolium ; stems short, leaves oblong concave entire api- 



culate or piliferous, capsule erect ovato-oblong, lid rostrate. 

 (TAB. XVI.) 



Dicranum latifolium. Hedw. St. Cr. v. I. t. 33. Turn. Muse. Hib. 

 ;?, 79. Hook. Fl. Scot. P. II. p. 132. Hobson, Brit. Mosses, v. 2. n. 32. 

 Didymodon latifolius. Wahl. Arn. Disp. Muse. p. 34. 



