Plant Pest
All species of the genus Hieracium are classed as invasive species throughout New Zealand. They are banned from sale, propagation and distribution under the National Pest Plant Accord. Hieracium is a pasture weed that reduces available feed for livestock and displaces the indigenous plants. It is a particular threat in alpine ecosystems previously dominated by native tussocks, though it will colonise habitats from bare ground, to exotic pine forest, to native Southern Beech forest.
In the United States, many species of Hieracium have been introduced and all species present are considered noxious weeds in one or more states.
Read more about this topic: Hieracium Anatomy
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