lia. 7. Types of 
placentation (attachment of ovules). Hy, //y- 
perteum densifloruim, Axile placentation in this case has developed 
from initial parietal placentation; H 1-2, flower buds with ovules 
on walls of ovary; THI 3, adult flower with ovules on axis, formed 
by the ingrowth of the placentae. renarta Korincana; Cen- 
tral placentation here has developed from initial axile placentation ; 
A 1-2, flower buds where ovary-walls connect with style; A 3-4, 
adult flower with central axis separate. T, Tamarix pentandra; 
Basal placentation with many ovules, occurring only in a few 
groups (probably a primitive form). M 1, Mesembryanthemum 
spectabile; M 2, Mesembryanthemum cordifolium, showing great 
difference in attachment of ovules in the same genus. 
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