Nastic Movements in Plants

[popeyespappy]

The leaves of mimosa trees react to being touched. Pull off a single pinnae of leaflets and the whole grouping will fold up. Apply a flame to a single pinnae and all the leaves on the tree will fold up the same way. It's a slower reaction, but that is what prompted my question. The mimosa tree is related to mimosa pudica in that they are both parts of the fabaceae family, but it is not a member of the mimosa genus or even the mimosoideae subfamily. They look very similar though and react to stimulus the same way.