Pampas grass jubata and pampas grass selloana are large perennial grasses, which grow up to 5 metres tall and originate from South America. They spread by windblown seed that will blow over 2 kilometres. They have the potential to form dense infestations, which compete with pine forests and displace native species on forest margins.
Pampas grass jubata is recognised as a weed in Hawaii, USA and pampas grass selloana is recognised as a weed in Victoria, Australia. In New Zealand, infestations exist throughout the North and South Island and in Marlborough, pampas grass is considered to be widespread.