Varicyatcd Leaves. IIS) 



LOT^ says, "L(if panaclinvc pent s'obtcnir pour uiiisi dire 

 a rolonte,'' 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 

 Tradcscantia repens 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.- 



On variegated shrubs we often see that in the better 

 lighted parts variegation is more intense and in the shader 

 ones less pronounced. Even variegated conifers such as 

 the Junipertis, may show this, and it is well known to be 

 the case with Sarnhucns nigra. 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.^ Pclargoniinn f:onaIe, Conval- 

 laria luajalts, Mentha aquafica, Phalaris arundinaeea. 

 Phlox decussata and others are given as instances.'' Such 



^ Verlot, loc. cit., p. 76. 



" For facts relating to the influence of galls on variegation in 

 nupoforiuDi cannalnuum see Vol. I, p. 407. 



" Meyen, Pflanzen-Pathologic, p. 287. 



* As for instance Salter, quoted in Darwtn", J^ariations. TT. pp. 

 263-264. 



^' Darwin^ he. cit., I, p. 390: TT. p. 263. 



