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Bat-wing passionflower
Named after its batwing shaped leaves and flowers that are very similar to the passionfruit flower.

Blackberry
Can quickly invade pasture, reducing area for grazing and breaking fences that it grows over.

Blue morning glory
Pantropical plant naturalised in 1950. Introduced to New Zealand as an attractive garden plant that flowers year round.

Bushy asparagus
A dense scrambler with small pinkish-white flowers (October to March), red berries, long prickly stems, and sharp spiny scales.

Cathedral bells
Also called cup-and-saucer vine, the flowers are green and smelly when young, then turn deep purple.

Chilean flame creeper
A climbing plant with coiling tendrils that allow it to climb up into the tree canopy.

Japanese honeysuckle
A vigorous climber with long, wiry stems that twine clockwise. It can grow up to 15m a year.

Jasmine
Very tolerant and extremely hard to kill, Jasmine can live up to 15 to 20 years in the wild.

Mile-a-minute
Originally from South Africa it is aptly named because it can rapidly choke and smother other plants.

Agapanthus
Attractive blue or white flowers form umbrella-shaped clusters of small flowers December to February.

Arum lily
A clump forming lily with large arrow-shaped leaves. Has a white, funnel shaped flower with a yellow spike.

Asiatic knotweed
Listed as one of the world’s worst invasive species by the World Conservation Union.

Bears breeches
Has large, glossy dark green leaves and white / purple tubular flowers on the stem of a spike.

Chilean rhubarb
A giant rhubarb-like plant up to 2m. Both the leaves and leaf stalks are covered in rubbery red prickles.

Field horsetail
Considered a 'living fossil' as the species has been around for over 300 million years

Formosa lily
A large lily with a simple stem up to 1m tall. Spreads quickly as seed is wind dispersed.

Giant knotweed
Can grow up to 4m with an extensive root system that can be up to 3m deep and up to 7m across.

Giant reed
Massive clump-forming perennial with thin leaves that tend to droop at the edges of clumps.

Green goddess lily
A clump-forming, evergreen plant with large glossy, leathery, dark green, arrow shaped leaves.

Himalayan balsam
Competes with native species for light, space and pollinators and can dominate vegetation on stream banks.

Montbretia
Orange or crimson flowers appear from January to February on stems that give it zig-zag shaped appearance.

Pampas
Large-clump forming grass up to 4 metres tall with erect fluffy, white pinkish or purplish flowerheads.

Purple nutsedge
Named due to its tubers that look like nuts. It is considered an invasive species in over 90 countries.

Royal fern
Royal fern is deciduous (dies back in winter) and has large fronds growing up to 3m long.

African feather grass
Identified by the straw yellow flowers with a purplish tinge that are present from December to April.

Chilean needle grass
The sharp, needle-like tips of the seeds can penetrate skin and their backward-pointing bristles make them hard to remove.

Himalayan fairy grass
Brought to New Zealand as an ornamental garden plant. Gardeners loved it for its ever-present flowers year round and hardiness.

Mexican feather grass
An extremely tough, thin densely tufted, perennial tussock grass that grows up to 70cm tall.

Reed sweet grass
Erect grass which grow aggressively to form large dense mats, usually found in nutrient-rich water and wet ground.

African club moss
A small, fern groundcover with long, fine roots and creeping, slender, irregularly 'stems'.

Aluminium plant
Grows rapidly to cover large areas of ground with a thick mat of hairy, silvery-grey patched leaves.

Horse nettle
Horse nettle is extremely invasive and hard to kill and all parts of the plant are poisonous.

Mouse ear hawkweed
Pale lemon-yellow flower heads (October to February) with leaves which lie flat to the ground.

Periwinkle
Scrambling with green trailing stems and blue-violet flowers appear from January to December.

Plectranthus
The plant stems covered in purple hairs and it has white flowers with purple dots inside (December to August)

Ragwort
Ragwort has bright yellow daisy-like flowers in spring and also has an unpleasant smell when crushed.

Snow poppy
A low growing, ground cover. Has leaves with scalloped edges that are leathery to the touch.

Apple of Sodom
A poisonous shrub that grazing stock will avoid, therefore reducing available grazing land.

Boneseed
Originally from South Africa Boneseed is named due to the white, bone-like appearance of its seeds.

Buddleia
Buddleia often forms in river beds which can alter water flow, causing silt build-up and flooding.

Cestrum species
Forms dense mats that shade out native species and is extremely toxic to farm animals.

Chinese privet
Produces a large number of seeds that are spread by birds to form dense stands which prevent native species from establishing.

Chinese windmill palm
A single straight trunk with leaves that are fan-shaped and divided into narrow leaflets.

Coastal banksia
A fast growing tree, rapidly maturing and producing a lot of seeds that are released in late summer.

Coast tea tree
Waves flush sand from underneath the tree roots causing erosion and creating steep dune slopes.

Cotoneaster
Has masses of shining red or orange berries and matures very quickly to form dense stands.

Darwin’s barberry
Named after Charles Darwin – who discovered it in South America in 1835. It was brought to New Zealand for hedging.

False Acacia
Can reach 30m in height. It's flowers have a fragrant smell and hang in droopy clusters.

Grey willow
A deciduous shrub or small tree, spreading or thicket forming with suckering roots and smooth bark.

Italian buckthorn
Popular as a hedging plant due to its hardy nature and exceptionally fast growth rate.

Kauri dieback disease
Kauri dieback disease is both incurable and fatal in kauri trees - potentially threatening the existence of whole kauri forests.

Monkey apple
An evergreen tree with smooth bark and whitish flowers which are followed by bunches of berry-like fruit.

Phoenix palm
The Phoenix palm can grow up to 18m tall with sharp spines and originates from the Canary Islands.

Prickly pear cactus
Leaves are big paddle-like structures, fleshy and heavy with spikes dotted over them.

Rice paper plant
Gets its name from the widespread (incorrect) belief that the plant is used to make rice paper.

Strawberry dogwood
Grows rapidly and produces a large number of seeds, which birds eat and disperse widely.

Sydney golden wattle
Native to Australia where, even in its native habitat, it is considered a pest of some coastal areas.