326 MR. A. S. HORNE ON DAVIDIA INVOLUCRATA. 
PLATE 32. 
Figs. 1-8. Vascular structure of the seedling of Davidia involucrata. 
Fig. 9. See pages 305 and 306. 
Fig. 10. Variation in the hermaphrodite flower of Davidia involucrata : 5-10, number of loculi; 15-37, 
number of stamens. 
Fig. 11. Variation in the male flower of the same: 2—30, number of groups; 2-10 (bottom), number of 
stamens in group. 
Fig. 12. Variation in the flower of Hedera Helix var. arborea : 4-9, number of stamens ; 1-7 (bottom), 
number of loculi. 
PLATE 33. 
Figs. 1-14. Diagrams illustrating the vascular structure of the inflorescence of Davidia involucrata. 
Figs. 15, 16. Diagrams to illustrate the vascular structure of congenitally-fused branchlets of 
the inflorescence of Viburnum stellulatum (15, two vascular cylinders in transverse section ; 
16, a single vascular cylinder). 
Fig. 17. Diagram of a transverse section to illustrate the vascular structure of the common stalk 
(peduncle) of the congenitally-fused inflorescence of Prunus serrulata. 
Norz.—Figure 1 has been accidentally drawn upside down. 
