Family: Poaceae (grass) More... African lovegrass . Weed identification is an important step toward weed control. A free-floating fern, with 2 leaf types. 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. Botanical Name: Olea europeaea subsp. With your help we can spot them and stop them before they get established. Common trees considered weeds include: wattles, willows, tree privet and wilding pines. 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. Commonly called bedstraw, Cleavers (Galium aparine) is a common annual weed found in crops, gardens, hedgerows and waste places throughout New Zealand. This project is a place to share your observations of old and new weeds in New Zealand. Weeds in New Zealand has 900 members. Many common weeds are not invasive and pose no serious threat - they are simply a nuisance. Common name starts with "A" African club moss. Scrolling down the page, for example, crocosmia is native to Africa, but widely planted as an ornamental. Because of the thickly growing populations, this weed can disrupt water flow. 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. Ian Popay, Paul Champion, Trevor James (2010) ISBN 978-0-473-16285-6. Your web browser must have JavaScript enabled in order for this application to display correctly. An Illustrated Guide to Common Weeds of New Zealand Third Edition. A common … Clasped pondweed is a submerged, browny-coloured perennial herb with trailing, leafy stems. Occurs at the edges of fresh water or moderately saline, lakes, streams, wetlands. Mature leaves are more common, crowded, compacted, folded about midrib, 1-4 x 1-5 cm, rounded, upper surfaces have many rows of water-repellent basket-like hairs. 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 forms dense beds of vegetation that shade out smaller native species, and it can contribute to blockage and flooding. Its recent discovery in Lake Waikaremoana is cause for concern and there is an eradication programme currently in place. Publication or other use of images or descriptive text on these pages is … Appropriate acknowledgement of the original source or publication must always be given. Dandelion weeds: The final two beneficial weeds that make the list offer the benefit of edibility. Gorse, one of New Zealand’s worst weeds, was originally brought from England for farm hedges. Lagarosiphon can be distinguished from other oxygen weeds as its leaves have a distinctive downward curl. Botanical Name: Selaginella kraussiana. There are also other weeds such as privet, gorse, broom and ragwort that might be in the top … To identify a pest plant, enter the name of the plant. The fruits of docks, once they have matured, are about 2-3 mm across and are often also used to tell dock species apart. Botanical Name: Eragrostis curvula. NZ Herald. Yellow flowers mature to puffballs. With its inherent stickiness the leaves, stems and seeds can cling to human clothing. Our focus is not on common weeds, but on a small number of high risk weeds that are extremely invasive and damaging. If you see any of these plants, take note of the location and inform your local DOC office. 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. Sagittaria is an emergent rhizomatous aquatic plant up to 80 cm tall, that can also produce submerged strap-like leaves. Identifying Pasture Weeds www.specseed.com.au Shepherds purse (Capsella bursa-pastoris) Summary: Common throughout NZ. 4. Unfortunately, weeds are often excellent at surviving and reproducing and are commonly the first plants to colonise and dominate. Dense, mat-forming perennial to 2-3 m. Rhizomes 2-3 cm diameter, to 5 m long, fibrous roots. Appearance: This common lawn weed has a strong taproot; leaves are deeply notched. The Himalayan blackberry (Rubus armeniacus) shown here is one of my favorite wild edibles, but the prickly brambles grow into impenetrable thickets along the Pacific Coast of the United States, and they were prolific all around New Zealand. Although Docks are common weeds of pastures and garden areas they are seldom associated with turf because they are so large. 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. Native Flowers, Shrubs, & Trees, Botany in a Day: The Patterns Method of Plant Identification. African oxygen weed Lagarosiphon major. These include common weeds, the Department of Conservation consolidated list of environmental weeds in New Zealand (Howell, 2008), the National Pest Plant Accord (NPPA) list of species banned from sale, distribution, and propagation in New Zealand, and Regional Pest Management Plan (RPMP) species. The leaves are very large and broad (up to 35 cm long and 15 … Scroll down the page to see some of the introduced weeds that are common around New Zealand. Weedbusters and Ministry of Primary Industries have more information and images to identify the weeds. It is often found in dams, ponds, drains, lakes and some slow moving waterways. Our pest search website has photos and descriptions of all pests in Auckland. Weeds that are trees or shrubs overtop or replace other plants and alter the composition of native plant communities, often preventing native plant regeneration. Common Weeds of New ZealandIntroduced and Invasive Species. Unlike many weeds, dandelion is a … In NZ they are weeds, but can be grown in some parts of the world for their edible leaves. Hornwort has a very delicate appearance, with forked dark green leaves finely serrated down one side. Mexican water lily has underwater rhizomes, creeping stolons and floating leaves, often with dark brown flecks on the upper surface. 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. Dandelions (Taraxacum officinale and Teracacum erythrospermum) David Beaulieu The common dandelion is a member of the aster family. 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. Help us improve the DOC website on mobile in less than 5 min. 01 of 09. These include animal pests, weeds, didymo, and diseases like kauri dieback. Alligator weed is a sprawling, rooted perennial herb that can grow in both dry terrestrial and aquatic conditions. Senecio species: Ragwort. See more ideas about weed, weed identification, plants. Identification: Its leaves are lobed but vary widely in shape even among plants growing together. It spreads rapidly by stout creeping rhizomes, and is capable of forming large, impenetrable stands along stream margins and in marshes and ditches. Or they can be unwanted plants that were accidentally introduced … Weeds can be plants that were intentionally introduced, but escaped cultivation to grow wild. Biodiversity inventory and monitoring toolbox, Weeds that pose serious threats to New Zealand. Family: Selaginellaceae (club moss) More... African feather grass. I am sure star weed would be high in a top 20 on the list of worst amenity turf weeds in New Zealand, but they are not very often a weed in gardens. Botanical Name: Cenchrus macrourus. 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. Infestations of this plant can also displace native plants in wetland areas. There are a number of species of senecio that are classed as weeds in Northland. Its recent discovery in Lake Waikaremoana is cause for concern and there is an eradication programme currently in place. Alternatively, you can browse the complete list or by groups. 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. Flowerhead a 40-60 cm long panicle, purplish or red-brown, with many seeds, November to December. This is the most common dock weed found around farmyards, in damp arable & pasture land, wasteland and gardens. 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. ( club moss ) More... African olive wasteland and gardens name starts ``... Turf situations is “ fiddle dock ” mexican water lily has underwater Rhizomes, creeping stolons and leaves... ( club moss ) More... 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