1634 



A TEXTBOOK OF THEORETICAL BOTANY 



Fig. 1493. — Papaver rhoeas. Vertical section of flower. 



Fig. 1494. — Papaver soniuifenini. P'lower. 



six-rayed stigma is borne. Closely allied to Meconopsis is Argemone, an 

 American genus which includes the Mexican Thistle, A. mexicana, which is 

 widely naturalized in the Old World. 



The genus Glaiichim is interesting chiefly because of the long curved 

 pod (Fig. 1496), formed from two carpels. This pod becomes two-chambered 

 as the result of the development of a false septum uniting the two parietal 

 placentas. When ripe it dehisces by two valves. In structure and appear- 

 ance it recalls the fruits of the Cruciferae and suggests a link with this 

 family. The Yellow Horned Poppy of our sea coasts is the only British 



