Human: What are some of the most common types of weeds? Assistant: 
Some of the most common types of weeds include broadleaf weeds, grass weeds, and annual weeds. Broadleaf weeds can be identified by their large leaves and often have a more coarse texture than other plants. Grass weeds grow in clumps and spread quickly through seed dispersal. Annual weeds usually produce flowers and seeds that are easily dispersed by wind or water.