These flower are commonly known as dandelions. Their latin name is Taraxacum officinale. Although they originated in the temperate northern hemisphere, today they are found all over world in temperate climates and grow everywhere in the fields. For a wide host of pollinators such as bees and butterflies, dandelions are a vital source in early spring.
Dandelion is edible and very commonly used as a herbal tea, for various ailments i.e. upset stomach, joint pain, gall stones as well as being known as a very good anti-inflammatory.
The above photo is of a Taraxacum species which produce seeds asexually and then turn into this fluffy white ball. When the seeds are ripe they easily detach and the wind then disperses them.
Read further details here: https://en.wikipedia.org/wiki/Taraxacum
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