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A clumping grass that is found in inter-tidal zones of coastlands and wetlands.
A tufted perennial grass with whorled branches that are bamboo-like in appearance.
Egeria doesn’t produce seed, instead it spreads through fragments breaking off and settling in new sites.
Lagarosiphon is one of the more ‘common’ oxygen weeds, made popular through the aquarium trade.
Marshwort colonises shallow waters, rapidly forming dense mats which cover waterways.
Introduced to New Zealand as an ornamental pond plant, it forms dense mats of floating leaves over large areas.
Originally from South America introduced into New Zealand as part of the aquarium and pond plant trade.
Perch originate from Europe and were introduced to New Zealand as a sports fish in the 1870’s.
Water poppy grows extremely fast, outcompeting native aquatic plants and quickly forming dense floating mats.
Purple loosestrife is a highly aggressive invader of wetlands. It forms massive, tall, thick stands, excluding all other plants.