THE MEGASPORAXGIUM 



47 



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

 of the older botanists. Canline ovules have also been reported 



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

 B. B. dioiea. a younger stage showing the mother-cell just after the first division; 

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

 canal"'; x 105. I\ B. dioiea, 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 IIofmeister. 8 



in Myzodendron punctulatum by Johnson, 22 and they doubtless 

 occur in other Santalaceae; and in Sparganium simplex, Lilaea 



