Ragwort is a poisonous weed. It is common in pastures because cattle will avoid it but it is also common in waste places.
Ragwort grows as a rosette in its first year. The leaf shape of ragwort is probably unlikely to be confused with many other weeds. Its leaves are not finely divided as weeds such as yarrow and stinking mayweed, but generally more finely divided than groundsel. Once ragwort flowers, it is very distinctive with its bright yellow flowers noticeable from some distance away. As it begins to flower, the rosette forms an upright stem which holds the flowers up to a metre above the ground.
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