A gallery of garden weeds pictures:
Annual weeds: Weed needs to complete its life cycle for surviving. Annual weeds are those weeds which are complete their life cycle in a year. Generally, they spread by seeding. Fertile soil is a good harbor of annual weeds.
Perennial weeds: These weeds complete their life cycle over a year and survive by means of underground stems or roots. They take food and nutrients from underground stems and roots during lack of sufficient food.
Gallery of Annual weeds:
Gallery of Perennial weeds: