PLANT WORLD— Vol. IL 



Pl.ATK V 



EXPLANATION OF FIGURES. 



I — Male plant, natural size. 2 — Part of stem, anterior view. 3— Part of stem, posterior 

 view. 4— Male branch. 5— Female branch with perianth, enclosing young sporophyte. 6— Cells 

 from middle of lobe. 7— Antheridium. 8, g— Perichsetial bracts. 10— Bracteole. 11, 12— Trans- 

 verse sections of perianth, n at about the middle, 12 in upper third. 13— Archegonium, almost 

 mature. 14 — Young sporophyte enclosed within calyptra, an unfertilized archegonium showing 

 at left. 15 — Mature sporophyte, showing torn calyptra at base. Figs. 2-15 variously magnified. 

 All the figures (except 15) are drawn from material collected by the writer at Jackson, New 

 Hampshire. 



