THE MEGASPORANGIUM 



borne, giving rise to the so-called " free central placentation " 

 of the older botanists. Cauline ovules have also been reported 



c 



D 



FIG. 16. A, BalanopJiora polyandra, with archegonium-like megasporangia ; x 15. 

 J?, B. dioica, a younger stage showing the mother-cell just after the first division; 

 x 200. <?, B. polyandra, " style " with a pollen- tube growing down into the ' stylar 

 canal"; x 105. Z>, B. dioica, longitudinal section of a nearly ripe seed; the sus- 

 pensor is not shown in this section. E, a similar section through the endosperm, 

 and embryo, showing the suspensor. After HOFMEISTER. B 



in Mijzodendron punctulatum by Johnson, 22 and they doubtless- 

 occnr in other Santalaceae ; and in Sparganium simplex, Lilaea, 



f w <-*:: ' ; ' 



