210 
irregularly over the surface of the leaf, sometimes very deep 
yellow in color standing out conspicuously from the agli 
green, while at other times the spots become quite dim—appe 
ing light green (fig. 3). Its flagon-shaped bright red and Race 
colored flowers add to its attractiveness as a plant. Plants of 
this type often lose their variegation and become permanently 
pure green plants (fig. 4.) 
Branches on the same plant usually show marked differences 
in the degree of irda All or part of the leaves on a 
branch may be y green. In the plate figs. 3 and 4 are two 
twigs from fee same a one bore leaves strongly variegated 
while the other bore green leav 
Lindemuth (1907, p. 39) arn that he first produced the 
variegated variety of Abutilon Sellovianum in 1870 through 
grafting with A. striatum Thompsonti. The species is readily 
susceptible and the variegation which appears seems quite 
identical with that in A. striatum Thompsonii. 
t appears that the various forms which have become infected 
directly or indirectly from A. striatum Thompsonit can in turn 
transmit the infection to other susceptible forms. It is interest- 
ing to note that forms of Abutilon striatum Thompsonti observed 
by Baur and Lindemuth occasionally produce branches that are 
pure green and which are immune to the infection. 
Chlorosis or variegation that is infectious is known in other 
genera besides Abutilon; such as Jasminum, Fraxinus, Liburnum, 
Ligustrum, Kitatbelia, and Nicotiana. The chlorosis of tobacco 
has attracted considerable attention on account of the economic 
importance of the plant, and it is of special interest in that the 
expressed cell-sap can carry the contagion, a condition that 
according to present knowledge does not prevail in Abutilon. 
Of the Abutilon varieties which have leaves with a marginal 
white zone, Abutilon Savitzit is of principal importance. The 
history of this type seems rather obscure. One brief report 
credits a gardener named Savitz, in St. Veit in Karnten, with 
breeding it from seed. In one instance it is described under the 
name of Abutilon venosum Savitzit as a plant having a white 
variegation that invades almost the entire leaf surface. Again 
