Many plant species use their ability for vegetative propagation in
their normal pattern of development (see vegetative propagation).
The production of these vegetative propagules, as with the production
of seed, is to increase numbers and provide a means by which the
plant survives adverse conditions. The energy storage for this
purpose makes them attractive as food for us, e.g. potatoes, onions,
All vegetative propagation is a form of division that has been exploited
by mankind for a very long time. In many cases little more than breaking
up the plant or taking the natural propagules is involved.