The following types of leaves were compared: (i) leaves with a
red visual appearance (2nd to 5th leaf from the top of the stem),
and (ii) leaves with a green visual appearance (5th to 8th leaf from
the top of the stem). All leaves measured were tri- or penta-foliate
and fully expanded, from stems with 13 to 16 leaves, when flower
bud was not yet or barely visible.