52 
S. L. Ghose 
the British Museum (Natural History), London, but neither is a leaf 
of Allium ursinum included amongst these, nor is there any case in 
which the enation is continued below the base of the “ lamina.” 
The fact that this example of a leaf-enation, which is continuous 
in both “petiole” and “lamina,” is found in a monocotyledon is 
interesting in connection with the Phyllode Theory of the mono- 
cotyledonous leaf, as will be seen later on. It may be mentioned 
Fig 2. Allium ursinum. Transverse section of the double “petiole” at the 
region where it was broken off. x 15. 
Fig. 3. Allium ursinum. Transverse section of the “laminar” portion of the 
double leaf, ss., stomata, x 10. 
here, however, that Worsdell (1915, 1 , p. 201) records the case of 
a double leaf in a vine, in which there was a double petiole, but the 
two blades were quite free from each other. As, however, it was un¬ 
known what position on the stem this leaf occupied, it is doubtful 
whether it was an example of a leaf-enation or a fusion of two leaves 
by their petioles only. Celakovsky (1884, Figs. 38, 39; and 1892, 
Fig. 17) also figures some leaves which had developed a small second 
blade from the petiolar region. But these enations were absolutely 
