PLATE 25 



A. — Longitudinal section of the inverted ovule: ov, ovule; ovc, ovule coats; es, 

 embryo sac; mic, micropyle; co, cavity of ovary. X 250. 



B. — Section tlirough the stylar canal, showing its structure shortly before the silk 

 emerges from the husk. The union of the two edges of the carpel will eventually be 

 more complete near the top than is here shown. X 250. 



