266 



PHILOSOPHICAL NOTES ON 



to have curved inwards, and their margins to have met, 

 instead of remaining open like leaves, with ovules on their 

 margins. 



Fig. 103. Sterculia (Le Maout and Decaisne). 



Then the margins of the carpels may so curve inwards as to 

 meet in the centre of the ovary, and form what is called a central 

 placenta, as in Hypericum (Fig. 104). 



(6.) On the whole interior surface of the carpel {general 

 placenta, as Paul Brousse calls it), as in Nymphrea 

 (Fig. 105). 



a h 



Fig. 104. Hypericum : («) unripe, (6) ripe capsule . 



Fig. 105. Nymphfpu. 



