Influence of the Adult Plant upon the Seedling. 331 
Figures 2, 3 and 4). The four seed-leaves are thus made up of two 
whole-cotyledons and two half-cotyledons. 
Series J. This seedling was found to be somewhat abnormal. 
Two of the four seed-leaves fused together just above the coty¬ 
ledonary node, so that it was expected that they would fall into the 
category of half-cotyledons. It was found, however, that the bundle 
of one bifurcated and formed one pole of the root-structure, whilst 
the strand of the other, together with that of the adjoining seed-leaf, 
formed one of the other poles of the triarch root, the remaining pole 
being organized from the vascular tissue derived from the fourth 
cotyledon. There were thus two whole-cotyledons and two half¬ 
cotyledons. 
Series K. Two of the cotyledons fused together just above the 
cotyledonary node, the others quickly did likewise so that a short 
cotyledonary tube was formed (Diagram 2, Figures 1 and 2). Of 
the seed-leaf bundles, three organized the three poles of the triarch 
root (Diagram 2, a , b and c) whilst the fourth (d) played no part in 
the transition. There were thus three whole-cotyledons and one 
subsidiary cotyledon. 
Diagram 2. Persoonia lanceolata, series K. 
4. A seedling with five cotyledons and a diarch root. 
Series L. From the number of cotyledonary buds and of 
leaves in the first foliage whorl it was anticipated that a triarch 
root-structure would be formed. This, however, was not the case. 
The root was diarch from the first, a transient triarch structure not 
being passed through. 
One cotyledonary strand (Diagram 3, b ) bifurcated and rotated 
in the normal fashion ; the bundles a and c, which were without 
influence in the transition, joined on to the adjacent halves of b ; and 
the strands d and e rotated towards each other and together 
organized the remaining pole of the diarch root. 
It is seen, therefore, that b corresponds to a whole cotyledon, 
d and e to half cotyledons, whilst a and c are subsidiary. This 
classification, however, is not quite satisfactory with regard to a 
