ANGIOSPERMS 225 
that the anther comes to contain only two spore cham- 
bers (Fig. 212). These two spore chambers are plainly 
Fic. 212.—Cross-section of a mature anther of a lily, much larger than that shown 
in Fig. 211, showing the two chambers formed by the four sporangia, and also 
the region of opening (s). 
Fic. 213.—Anthers opening by terminal pores: 4, Solanum; B, Arbutus; C, 
Vaccinium.—A and B, after ENGLER and Prantt; C, after KERNER 
