Variegated Leaves. 279 
LOT 1 says, "La panachure pent s'obtenir pour ainsi dire 
a -culunte" by merely growing them in a dry position. 
A dry position is however at the same time as a rule a 
sunny one, whereas a damp one, as a rule, is shaded. 
Experiments which I have conducted with these and 
several other variegated sorts of various species, in order 
to determine the influence of daily and profuse watering 
in full sunlight on variegation, have been without any 
positive result. On the other hand I succeeded with 
Tradescantia repcns in controlling the proportion of yel- 
low and green stripes. In this experiment I cultivated 
the plants in pots and simply removed the pots to better 
or less well-lighted parts of the greenhouse without alter- 
ing the soil or the amount of water I gave them. The 
more intense the light the more variegated were the new 
leaves that were formed. 2 
On variegated shrubs we often see that in the better 
lighted parts variegation is more intense and in the shadec 
ones less pronounced. Even variegated conifers such as 
the Juniperus, may show this, and it is well known to be 
the case with Sambuciis nlgra. The variegation in myr- 
tles with striped leaves is also dependent on nutrition ; :: 
and various authors and gardeners hold that the soil and 
position exert a more or less important influence on the 
degree of variegation. 4 Pelargonium zonale, Conral- 
laria majalis, Mentha aquatlca, Phalaris arundinacea, 
Phlox decussata and others are given as instances. 5 Such 
1 VERLOT, loc. cit., p. 76. 
2 For facts relating- to the influence of galls on variegation in 
Eupatorinm cannabmum see Vol. I, p. 407. 
" MEYEN, Pftaiizen-Pathologie, p. 287. 
4 As for instance SALTER, quoted in DARWIN, Variations, II, pp. 
263-264. 
n DARWIN, loc. cit., I, p, 390; II, p. 263. 
