Polyploidy is very common in plants, especially in angiosperms.
In fact, the chromosome content of most plants groups suggests that the basic angiosperm genome consists of the genes on 7-11 chromosomes. This has led to the deliberate creation of polyploid varieties of such plants as watermelons, marigolds, and snapdragons. Polyploidy can be induced by treating dividing cells with colchicine. This drug disrupts microtubules and thus prevents the formation of a spindle. Consequently, the duplicated chromosomes fail to separate in mitosis.