208 
these forms reports that previous determinations of A. striatum 
include two distinct species with a confusion of the real A. 
striatum of Guatemala with A. pictum of Brazil. His clas 
tion places variegated forms of this group in each of the ig 
pictum Walp.; A. striatum Thompsonii Veitch; . Thompsonit 
Hort.; A. striatum kewense N. E. Br. The treatment of this 
group in the new edition of Bailey’s Cyclopedia 7 Horticulture 
differs somewhat from Brown’s treatment in giving the names A. 
striatum spurium Lynch, and A. hybridum Hort. in addition to 
the first two mentioned above as forms which have been confused 
with the true A. striatum Thompsonit. 
It is evident that there are numerous forms with variegation 
= similar to that of the original ve striatum Thompsonii, 
with quite ae foliage and flower characters. The 
ee of these various types is a matter of considerable interest. 
There seems to be no conclusive evidence regarding vegetative 
variations in the original strain of A. striatum Thompsonii or of 
the repeated spontaneous origin of the flecked variation in these 
orms. Soon after its introduction, A. striatum Thompsonii 
was propagated quite extensively by grafting and it was noted 
that the variegation was infectious and that green plants used 
as stock often became variegated. In: this way 
variegation was communicated to numerous varieties and hybrids 
of horticultural origin and these have been generally propagated 
r the name A. Thompsonit. It is known that the variegate 
varieties of A. Darwinii, A. Sellovianum,.and A. megapotamicum 
originated by grafting A. striatum Thompsonit on pure green 
ants of these species 
In the plate accompanying this article, typical leaves of two of 
these types are shown. One (fig. 1) has three-lobed leaves 
evidently much like A. pictum Walp. The other (fig. 2) has 
5-7-lobed leaves. Neither of these conform exactly to the 
original descriptions of A. striatum Thompsonit. In fact it does 
not appear that the true form of this variety is in cultivation 
The nature and cause of infectious variegation is a matter of 
much interest and has already been a subject of considerable 
