THE MEGASPORANGIUM 



47 



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

 of the older botanists. Cauline ovules have also been reported 



E 



Fig. 16. — A, Balanophora polyandra, with archegonium-like megasporangia ; x 15. 

 B, B. dioica, a younger stage showing 1 the mother-cell just after the first division; 

 x 200. C\ B. polyandra," style 11 with a pollen- tube growing down into the "stylar 

 canal"; x 105. D, B. dioica, longitudinal section of a nearly ripe seed; the sua- 

 pensor is not shown in this section. _£*, a similar section through the endosperm 

 and embryo, showing the suspensor. — After Hofmeisteb. 6 



in Myzodendron punctulatum by Johnson, 22 and they doubtless 

 occur in other Santalaceae ; and in Sparganium simplex, Lilaea 



