59 
by Gordonia Alatamaha, of which we had this fall abundant 
flowering. 
In the Engler system the Parictales are followed by the Opiun- 
tiales. The resemblances between Cactaccae (Opuntiales) and 
Loasaceae (VParietales) are very great. In the systems of Ben- 
tham and Hooker, and also in those of Warming, Wettstein, 
Bessey, and Hutchinson, the Cactaceae are placed near Aizoaceae 
(Centrospermae or Caryophyllales). Here also the resemblances 
are very great. The illustration (Fig. 4) shows flower buds 
from these families. It may be that the Cactaceae should be con- 
Fic. 7. Primula obconica. Flower bud and adult flower, showing central 
placentation. (7173.) 
