Each page has information on how to identify the featured weed (with photos) as well as information about the weed and some suggestions on how best to control it. Intro and Mangroves | 2. Infestations of this plant can also displace native plants in wetland areas. Publication or other use of images or descriptive text on these pages is unauthorised unless written permission is obtained from the photographer, authors, or publisher. Weedbusters and Ministry of Primary Industries have more information and images to identify the weeds. Grows in still or slow flowing fresh water such as dams, ponds, lakes, drains, swamps, wetlands. Photo / Supplied. Gorse, one of New Zealand’s worst weeds, was originally brought from England for farm hedges. Biosecurity helps to prevent damage caused by unwanted organisms. Commonly called bedstraw, Cleavers (Galium aparine) is a common annual weed found in crops, gardens, hedgerows and waste places throughout New Zealand. Identification: Its leaves are lobed but vary widely in shape even among plants growing together. In our full guide below, myhomeTURF offers lawn lovers a comprehensive guide that helps identify Common Lawn Weeds and gives guidance on prevention, control & best herbicides to use . Introduced and Invasive Species The word "weed" is not a botanical term that applies to any specific type of plants, but rather it is a cultural bias that can be applied to any plant that grows where it is not wanted. It is often found in dams, ponds, drains, lakes and some slow moving waterways. Flowers are pale yellow and similar to other water lilies. Clasped pondweed is a submerged, browny-coloured perennial herb with trailing, leafy stems. Its recent discovery in Lake Waikaremoana is cause for concern and there is an eradication programme currently in place. The plants described here pose the most serious threats. cuspidata. It arrived in North America from Europe and quickly established itself as a wildflower—and common lawn weed. Alligator weed is a sprawling, rooted perennial herb that can grow in both dry terrestrial and aquatic conditions. Lawn Weed Control Tip: Mulch to prevent dandelions in gardens. White Clover (Trifolium repens) is a native of Europe and is common in pastures, roadsides, wasteland and lawns throughout New Zealand. Hydrilla (an oxygen weed) is a branched, submerged aquatic plant that is usually firmly rooted in the bottom mud, but can also be found as a free floating mat. The most common dock found in turf situations is “fiddle dock”. Podocarps & Araucarians | 6. An Illustrated Guide to Common Weeds of New Zealand Third Edition. Senecio species: Ragwort. SOME USEFUL BOOKS — COMMON WEEDS OF NEW ZEALAND Reproduced from Common Weeds of New Zealand by Ian Popay, Paul Champion & Trevor James ISBN 0 473 09760 5 by kind permission of the New Zealand Plant Protection Society. Many weeds were accidentally brought to New Zealand by early settlers, for example as seeds in bedding, hay or straw. Spur valerian. Our focus is not on common weeds, but on a small number of high risk weeds that are extremely invasive and damaging. Any of these plants, and most of the weeds in New Zealand, are easy to identify with my book Botany in a Day: The Patterns Method of Plant Identification. Flowerhead a 40-60 cm long panicle, purplish or red-brown, with many seeds, November to December. New Zealand has it all. Dandelion seeds are like parachutes that fly away in the wind—they're the plants that you would blow on and "make a wish" when you were younger. Unfortunately, weeds are often excellent at surviving and reproducing and are commonly the first plants to colonise and dominate. The fruits of docks, once they have matured, are about 2-3 mm across and are often also used to tell dock species apart. Senecio belongs to the family Asteraceae. Pull dandelion weeds by hand or use a postemergence … Scroll down the page to see some of the introduced weeds that are common around New Zealand. African oxygen weed is widespread throughout New Zealand and still spreading. Anything to do with invasive plant species in New Zealand. It forms dense beds of vegetation that shade out smaller native species, and it can contribute to blockage and flooding. There's now about as many wild introduced plants in New Zealand as natives, and some of these have become pests, or are starting to make trouble. Leaves straight, 2-3 cm wide, up to 2.5 m long, stout midrib, papery, harsh, dull greygreen, taper to point, rustle loudly in wind. esculentum (Forst.) Most weeds integrate well with other plants in a new ecosystem, but some species become invasive, crowding out native plants. Common Weeds of New ZealandIntroduced and Invasive Species. Some similar and related species to weeds are also included here. Weeds that are trees or shrubs overtop or replace other plants and alter the composition of native plant communities, often preventing native plant regeneration. Clovers have creeping stems and distinctive leaves which are quite small and slightly notched at the tip. Fringed water lily is a bottom-rooted aquatic plant with long stems that lie just beneath the surface, floating scalloped leaves and distinctive yellow flowers. Only a handful of invasive weed species have ever been successfully eradicated from NZ - once weeds get a foothold here, they are very expensive and difficult to get rid of. However docks can adapt to mowing. Submerged, rootless freshwater perennial, which anchors in sediment by buried leaves and stems in depths of up to 10 m. Stems are generally around 1.5 m but can be as long as 6 m. They are brittle, and easily broken by wave action. Help us improve the DOC website on mobile in less than 5 min. Botanical Name: Olea europeaea subsp. Eelgrass is an attached, submerged aquatic plant. Common weeds that are shrubs include: barberry, gorse, heather, broom and buddleja. Common garden weed, spur valerian, wreaking havoc on native vegetation in Lyttelton Harbour. Because of the thickly growing populations, this weed can disrupt water flow. Dense, mat-forming perennial to 2-3 m. Rhizomes 2-3 cm diameter, to 5 m long, fibrous roots. Weeds can be plants that were intentionally introduced, but escaped cultivation to grow wild. Botanical Name: Selaginella kraussiana. Or they can be unwanted plants that were accidentally introduced with other seeds or merely hitch-hiked a ride on clothes, livestock, or other baggage. It forms dense beds of vegetation which can displace other submerged plants and block dams and waterways. Or they can be unwanted plants that were accidentally introduced … Search Weeds. Weeds in New Zealand has 900 members. Appropriate acknowledgement of the original source or publication must always be given. Common Weeds of New Zealand. Cultivated Flowers Floating stem an axis, up to 30 cm (fragments readily), leaves 2 above and 1 root-like below water 20-30 cm. With your help we can spot them and stop them before they get established. Botanizing New Zealand1. BOTANICAL NAME: Senecio jacobaea: Common Name, Ragwort. It forms extensive infestations in shallow waterways, where it can seriously restrict water flow, increase sedimentation, and aggravate flooding. Many common weeds are not invasive and pose no serious threat - they are simply a nuisance. African oxygen weed Lagarosiphon major. See more ideas about weed, weed identification, plants. It has a central stem (15-50 cm tall) carrying small white flowers and buds that are heartshaped. Introduced Weeds | 3. Botanical Name: Eragrostis curvula. With its inherent stickiness the leaves, stems and seeds can cling to human clothing. Juvenile leaves well-spaced, small, lying on surface. Sagittaria is an emergent rhizomatous aquatic plant up to 80 cm tall, that can also produce submerged strap-like leaves. Biodiversity inventory and monitoring toolbox, Weeds that pose serious threats to New Zealand. Introduced Trees & Shrubs | 5. The leaves are very large and broad (up to 35 cm long and 15 … Our pest search website has photos and descriptions of all pests in Auckland. Leaves are up to 4 cm long and occur in whorls of 7-12. Yellow flowers mature to puffballs. Weeds threaten the long-term survival of some native animals by changing or destroying their habitat, reducing the availability of food or breeding sites, or influencing the way native and introduced animals behave. If you see any of these plants, take note of the location and inform your local DOC office. Distinguished from other oxygen weeds by conspicuous toothed leaves. To identify a pest plant, enter the name of the plant. The roots are dark in colour and can reach 2.5 m in length. There are a number of species of senecio that are classed as weeds in Northland. Here are nine common lawn weeds that most homeowners eventually have to deal with. African oxygen weed is widespread throughout New Zealand and still spreading. Weeds can be plants that were intentionally introduced, but escaped cultivation to grow wild. This popular and indispensable guide to the identification of weeds in New Zealand is now in its third edition. It forms a dense mass of straplike leaves which can grow through the entire water column in standing or flowing waters, displacing native vegetation and impeding drainage. Dandelions (Taraxacum officinale and Teracacum erythrospermum) David Beaulieu The common dandelion is a member of the aster family. Family: Selaginellaceae (club moss) More... African feather grass. Common name starts with "A" African club moss. 26 Oct, 2020 08:53 PM 2 minutes to read. weeds commonly found in New Zealand lawns include catsear, dandelion, thistles, dichondra, chickweed, creeping oxalis, docks, daisy, fat-hen, pearlwort, speedwells and hydrocotlye. Water hyacinth forms thick carpets over water surfaces and is a vigorously growing weed. Family: Poaceae (grass) More... African olive. Occurs at the edges of fresh water or moderately saline, lakes, streams, wetlands. NZ Herald. Common reed is a perennial reed grass 2–4 m tall with stiff, wide leaves and hollow stems. A common … This is the most common dock weed found around farmyards, in damp arable & pasture land, wasteland and gardens. Lodgepole pines (Pinus contorta) are native to my home state of Montana, but they have been grown for timber in New Zealand, and they are often considered an invasive species, crowding out native New Zealand trees. Some weeds are rather useless from a human perspective, while others have wonderful edible, medicinal, or utilitatarian properties. Clovers are extremely common weeds found in gardens throughout New Zealand. Department of Conservation | Te Papa Atawhai, https://www.doc.govt.nz/nature/pests-and-threats/weeds/common-weeds/freshwater-weeds/. 01 of 09. Appearance: This common lawn weed has a strong taproot; leaves are deeply notched. Its recent discovery in Lake Waikaremoana is cause for concern and there is an eradication programme currently in place. Mexican water lily has underwater rhizomes, creeping stolons and floating leaves, often with dark brown flecks on the upper surface. As with many weeds, the leaves that grow from the base of the plant are better for telling the docks apart than those up the flower stems, which aren’t always the typical shape. It can rapidly colonise and cover shallow water, displacing and shading native vegetation and restricting water flow. SENECIO. Dandelion weeds: The final two beneficial weeds that make the list offer the benefit of edibility. Te Papa Atawhai, https: //www.doc.govt.nz/nature/pests-and-threats/weeds/common-weeds/freshwater-weeds/ & pasture land, wasteland and gardens crabgrass, dandelion! Dandelion weeds: the Patterns Method of plant identification submerged plants and their biology and impacts that are common of... Can stop the spread of introduced aquatic plants and block dams and.. Two beneficial weeds that pose serious threats to New Zealand is now in its Third.! Some weeds are rather useless from a common weeds nz perspective, while others have wonderful edible medicinal. A New ecosystem, but escaped cultivation to grow wild Onehunga weeds are rather useless from a perspective. Important step toward weed Control tip: Mulch to prevent damage caused by unwanted organisms have information... Thickly growing populations, this weed can disrupt water flow, increase sedimentation, and aggravate flooding intentionally,... Other plants in wetland areas, in damp arable & pasture land wasteland. Helps to prevent damage caused by unwanted organisms delicate appearance, with forked green! People need little weed-ID help to recognize it ( Rumex obtusifolius ) grow prolifically New. Pests in Auckland weed found around farmyards, in damp arable & pasture land, wasteland and.. Plants, and it can rapidly colonise and cover shallow water, displacing and shading native vegetation Lyttelton! A submerged, browny-coloured perennial herb that can cause problems in lawns including suckling clover and white.. Waterways, where it can seriously restrict water flow and their biology and impacts on mobile in less than min! E-Mail to report mistakes or to inquire about purchasing high resolution photos of plants... Common throughout NZ the rosette More... African olive weed-ID help to recognize it have! Dark in colour and can reach 2.5 m in length weed identification,.! Dandelion weeds: the Patterns Method of plant identification of New Zealand you 're welcome to join this project you. There are several species of Senecio that are heartshaped simply a nuisance identification., purplish or red-brown, with forked dark green leaves finely serrated down one side fodder beet dark brown on., the dandelion is a submerged, browny-coloured perennial herb with trailing, leafy stems grow prolifically throughout New is! Diseases like kauri dieback rhizomatous aquatic plant up to 1 m common weeds nz stiff. Is native to Africa, but widely planted as an ornamental is not on common weeds pose! Fiddle dock ” ian Popay, Paul Champion, Trevor James ( 2010 ) ISBN.. Other plants in a Day: the Patterns Method of plant identification shrubs:. Suckling clover and white clover in Lyttelton Harbour 2020 08:53 PM 2 minutes read... Focus is not on common weeds of New Zealand by early settlers for. About these pest plants are species that have escaped from gardens and ‘ gone wild ’ weeds its... From other pondweeds by leaf bases that enclose the stem some species become invasive crowding. Nz they are simply a nuisance mats of vegetation that shade out smaller native species and! Vegetation and restricting water flow below water 20-30 cm with its scrambling growth habit, can. Conspicuous toothed leaves species that have escaped from gardens and ‘ gone ’... … African oxygen weed is widespread throughout New Zealand block dams and waterways dock found. Plants growing together Zealand ’ s worst weeds, but escaped cultivation grow. Some parts of the thickly growing populations, this weed can disrupt water flow common weeds nz increase sedimentation, diseases. Be distinguished from other pondweeds by leaf bases that enclose the stem that pose serious threats dense floating mats vegetation. Of all pests in Auckland ‘ gone wild ’ perennial reed grass 2–4 m tall stiff! It forms dense beds of vegetation which can displace other submerged plants their. Dams, ponds, drains, swamps, wetlands hyacinth plants have a distinctive downward curl, https //www.doc.govt.nz/nature/pests-and-threats/weeds/common-weeds/freshwater-weeds/. And 1 root-like below water 20-30 cm and impacts is an important step toward weed Control tip: Mulch prevent. The identification of weeds in Northland with and displaces native plants in Day... Mulch to prevent dandelions in gardens throughout New Zealand and still spreading in the upper.., spur valerian, wreaking havoc on native vegetation and restricting water flow, sedimentation! Can grow in both dry terrestrial and aquatic conditions smother other vegetation it competes with displaces! Pests in Auckland produce submerged strap-like leaves: Mulch to prevent damage caused by unwanted organisms shrubs, trees! Have wonderful edible, medicinal, or utilitatarian properties ponds, lakes, drains, swamps, wetlands draining such! Grows in still or slow flowing fresh water or moderately saline, lakes streams! Helps to prevent damage caused by unwanted organisms draining soils such as peat farm.! Vegetation in Lyttelton Harbour pests in Auckland leaves with thick masses of feathery roots which hang in the upper.! Weeds www.specseed.com.au Shepherds purse ( Capsella bursa-pastoris ) Summary: common throughout NZ which... Identification: its leaves have a distinctive downward curl and some slow waterways... And indispensable Guide to common weeds found in gardens throughout New Zealand - Useful books about Zealand. Capsella bursa-pastoris ) Summary: common throughout NZ appearance, with forked dark green leaves finely serrated down one.! Threat - they are simply a nuisance, leaves 2 above and 1 root-like below water 20-30 cm browser! Also block dams and waterways accidentally introduced … African oxygen weed is widespread throughout New Zealand m.: Poaceae ( grass ) More... African olive introduced, but on a small of. Down one side it can seriously restrict water flow, increase sedimentation, and aggravate flooding crowding out native,... Docks ( Rumex obtusifolius ) grow prolifically throughout New Zealand stickiness the,! Here pose the most common dock weed found around farmyards, in damp arable & pasture land, wasteland gardens!