Dandelions are native to Eurasia and North America; the two species, T. officinale and T. erythrospermum, are found as weeds worldwide. The name dandelion comes from the French word dent-de-lion, meaning "lion's tooth." Dandelion plants are from the Asteraceae family and part of the Taraxacum species. They look like very small flowers that are collected together into a flower head, or floret.
Many Taraxacum species produce seeds asexually by apomixis, meaning the seeds can be produced without pollination. This is why dandelions are genetically identical to the parent plant.
The leaves of a dandelion flower are typically five to 25 centimeters long. The flower heads are a yellow to orange color; they open in the daytime and stay closed at night. When you break the stem of a dandelion, it exudes a white and milky liquid. When the flowerhead matures, it becomes a white ball that contains many seeds and fine hairs.