AFFINITIES OF DAVIDIA INVOLUCRATA. 311 
small dots. The composite bundles, A, D, G, K, N, and R, of the outer cylinder are 
represented by black and white dots. One of these, N, has already divided (diagram 3). 
Higher up in the ovary (diagram 4) the bundles D, J,and K have divided. In diagram 5 
all the composite bundles have divided and the inner branches occupy a ** dorsal " position. 
In the region of the style the bundles of the inner cylinder collect about the * dorsal " 
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Vascular strueture of the ovary of Davidia. 
bundles (diagram 6), so that ultimately seven are-shaped bundles are formed (diagrams 
7, 8. The seventh bundle, U, behaves exactly as the others—except that it does 
not give rise to a staminal bundle. The three groups of small septal strands are shown 
in diagram 4 in the septum between the loculi in a line with K, N, respectively. The 
septal strands are seen entering the ovule which is opposite G. One of the strands, LM, 
of the outer cylinder divides to form two (diagrams 3, 4). 
SECOND SERIES.— BOTANY, VOL. VII. 
