Mouse-ear hawkweed (Hieracium pilosella) is a major problem in some South Island tussock grasslands. It favours dry, sunny areas on sandy, less fertile soil. It produces stolons (stems that grow across the surface of the ground), which generate a new rosette at their extremity and form dense mats, taking up pasture space. It is also propagated by seeds. Hawkweed is hairy and unpalatable to sheep.
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Photograph by Barrie J. Wills
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