Variagated
Have more that one colour present. This can apply to both leaves and flowers.
Variety
A strain of plant having distinctive features which persist over successive generations in the absence of human intervention. Generally, variety applies to these naturally occurring strains, while Cultivar applies to horticulturally developed strains.
Vegetable
Grown from the vegetative parts of a plant.
Veins
Vascular bundles that transport water and food to and from the leaf.
Virus
As with a human virus, its an infectious disease that cannot be treated with chemicals and can be quite harmful or even fatal to the plant.