Dandelion is a plant with yellow flowers. Taraxacum officinale is the most common variety of this plant, and it grows in many parts of the world. Botanists consider dandelions to be herbs. People use the leaves, stem, flower, and root of the dandelion for medicinal purposes.
Many Taraxacum species produce seeds asexually by apomixis, where the seeds are produced without pollination, resulting in offspring that are genetically identical to the parent plant.
For me they are just weeds in the grass. A yellow flower that looks interesting but then changes to wind blown seed pods that makes more weeds. ARRGGGG.
With help from Wikipedia