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it is called an improved Souvenir de Bonn. But all attempts at 
identifying it point to the white margination of the leaf, its 
most striking characteristic. 
The typical leaf of this variety consists of five lobes irregularly 
margined with white which often invades the dark grayish green 
central portion of the leaf (fig. 5). In the very young leaves 
the white margin appears as a deep cream, which becomes more 
white with the advancing age of the leaf. Frequently, however, 
unsymmetrical leaves develop. Often the white margin of entire 
lobes or parts of lobes is interrupted by the invasion of green 
tissue protrusions which cause the leaf to ne abnormally 
(fig. These green tissue protrusions, due to their greater 
rate of ierowih: cause a twisting and bulging of i leaf surface 
which imparts an odd appearance to the leaf 
The variegation in the Abutilon Savitzii is non-infectious, and 
all efforts to transfer the white margination of leaf to numerous 
green forms of the genus Abutilon by grafting methods have 
ailed 
The white or almost colorless tissue which forms the margins 
of the leaves also extends over the green tissue in the central 
portion of the leaves. The white cells are external or peripheral 
and the green are internal. Baur (1909) applied the term 
periclinal-chimera to various ine alia having this sort of 
arrangement of green and whit 
Irregularities in the vigor - ee of the green and white 
cells in growing points result in varying amounts of green and 
white in the mature leaves. When the external white tissue 
grows to the exclusion of oe green, a white leaf is formed. 
When the green cells develop most rapidly, they protrude 
through the enveloping layers of white cells and forms leaves 
in part or wholly green, or even all green shoots. Figure 7 
shows a pure green leaf from a plant of A. Savitsiz. These pure 
green leaves are larger and more regular in shape than are the 
typical variegated leaves. In propagating Abutilon Savitzii, 
these pure green branches are constantly being discarded by 
gardeners. A pure green plant derived from A. Savitsii at the 
New York Botanical Garden was grafted with a small scion from 
