white thistle

definition: spiny shrub with silvery-scurfy foliage of alkaline plains of southwestern United States and Mexico
example:
speech part: noun
synonyms: quail bush
definition: any plant of the genus Argemone having large white or yellow flowers and prickly leaves and stems and pods
example:
speech part: noun
synonyms: prickly poppy argemone devil's fig

How white thistle is being used?