DEVELOPMENT OF PLANTS 



307 



rounded on the outside, and less commonly on the inside, by 

 loose chlorophyll-bearing cells which extend down to the base 

 of the capsule where chlorenchyma and stomata are developed. 

 This lower region of the capsule, the apophysis, is often enlarged 

 and provided with air spaces and stomata, thus constituting the 

 chief photosynthetic apparatus of the sporophyle (Fi^^. 210. :^A ). 



F:o. .11. Structure of capsule of ^"--^5' "^^J^ V^ l,;; ^i 

 removed. 6, section of nearly mature ^f P^^^^-J^,^,;^^:;,^^ .. o,xt. 



roundea on outside by loosely arranged ^h oroplnll-bcarm, c . ^,^ ^ 



culum; .. annulus; p, peristome; a. ^pophys .- J>. ^ ^ .,.^^.,„,, ,,„, 

 portion of the capsule, showing the ^-^^-^.;^^ he cpi<lcrnus by 

 of the peristome. ^ which --/"^^f ,,^\;':;;t Hnc should ^ 

 a double row of cells; ^^ spore-formmg c^, he It 1 ^^^^^^ ^^^^^^ 



four roundish cells at the left. 7. '^ '^^^^^L of the ,K-ristom..- ^•••- 

 thus forming the inner and outer teclh-hke >ogmcnt^ 1 



Sachs. 



