Story: Weeds of agriculture

Alligator weed

Alligator weed

One of the world’s most serious aquatic weeds, alligator weed (Alternanthera philoxeroides) was accidentally introduced to New Zealand, and was first discovered near Wairoa in 1906. It grows on land and in water, spreading aggressively from even the smallest stem fragments. It can double in area in less than two months.

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How to cite this page:

Ian Popay, 'Weeds of agriculture - Weeds in water and in ecosystems', Te Ara - the Encyclopedia of New Zealand, (accessed 22 April 2024)

Story by Ian Popay, published 24 Nov 2008