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blue on blue


The blue of a leaf is due to a wax coating in the outer layer  If it 
is present it is always on th ewhole leaf If the dge is yek loow the 
wax makes the yelow dull but it is not absent. The same reason it 
seems inpossible to have a blue plant with a shiny  green edge 
although if you have a greenish-yellow edge the wax makes it look 
nearly green 
Ben J.M.Zonneveld
Clusius lab pobox 9505
2300 RA Leiden
The Netherlands
Zonneveld@RULbim.LeidenUniv.NL
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