FLOWERLESS PLANTS. 



181 



of which is seen an 

 urn-shaped body 

 of curious struct- 

 ure, called a spo- 

 range (e). 



SETA. The 

 stalk of a spor- 

 ange (d). 



VAG IN u LE. 

 The collar or 

 sheath at the base 

 of the seta, re- 

 sulting from the 

 bursting of the 

 epigone. 



CALYPTRA. 

 The cap or hood 

 of a sporange, 

 shown at /, and 

 seen in place at e. 



OPERCULUM. 

 The lid of the 

 sporange (#), seen 

 when the calyptra 

 is removed. 



PERISTOME. 

 A single or double 

 fringe of teeth 

 around the mouth 



of a sporange. It is sometimes altogether absent. These 

 teeth vary very much in number, but are always either 

 four or some multiple of four. 



ANNULUS. An elastic ring sometimes found in the 

 mouth of a sporange. 



SPORES. The ripened contents of the sporange. 



FIG. 476. 



