Hornwort has a very delicate appearance, with forked dark green leaves finely serrated down one side. Most weeds integrate well with other plants in a new ecosystem, but some species become invasive, crowding out native plants. 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. This is the most common dock weed found around farmyards, in damp arable & pasture land, wasteland and gardens. Clovers have creeping stems and distinctive leaves which are quite small and slightly notched at the tip. Common reed is a perennial reed grass 2–4 m tall with stiff, wide leaves and hollow stems. weeds commonly found in New Zealand lawns include catsear, dandelion, thistles, dichondra, chickweed, creeping oxalis, docks, daisy, fat-hen, pearlwort, speedwells and hydrocotlye. 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. A free-floating fern, with 2 leaf types. However docks can adapt to mowing. You can stop the spread of introduced aquatic plants and animals that compete with, attack or smother our native aquatic species. Common trees considered weeds include: wattles, willows, tree privet and wilding pines. There are a number of species of senecio that are classed as weeds in Northland. Flowers are pale yellow and similar to other water lilies. These grow as rosettes, with leaves … SENECIO. Dandelions (Taraxacum officinale and Teracacum erythrospermum) David Beaulieu The common dandelion is a member of the aster family. 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. Water hyacinth plants have a free-floating rosette of shiny rounded leaves with thick masses of feathery roots which hang in the water. Yellow flowers mature to puffballs. 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. Common name starts with "A" African club moss. Black beetle (Heteronychus arator) is a pest in the upper North Island, on light, free draining soils such as peat. Its recent discovery in Lake Waikaremoana is cause for concern and there is an eradication programme currently in place. 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. Occurs at the edges of fresh water or moderately saline, lakes, streams, wetlands. Some selective herbicides will kill broadleaf weeds without harming surrounding grasses. Cultivated Flowers Publication or other use of images or descriptive text on these pages is … New Zealand has it all. 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. Spur valerian. Ian Popay, Paul Champion, Trevor James (2010) ISBN 978-0-473-16285-6. Common Weeds of New Zealand. A common … 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. Common Weeds of New Zealand (Page 1 | Page 2 | Page 3) Top of page. Some similar and related species to weeds are also included here. 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. African oxygen weed Lagarosiphon major. 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. Introduced Weeds | 3. 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. In NZ they are weeds, but can be grown in some parts of the world for their edible leaves. Weeds in New Zealand has 900 members. It forms dense beds of vegetation which can displace other submerged plants and block dams and waterways. The roots are dark in colour and can reach 2.5 m in length. With its scrambling growth habit, cleavers can compete and smother slow growing crops like fodder beet. Many invasive pest plants are species that have escaped from gardens and ‘gone wild’. Weedbusters and Ministry of Primary Industries have more information and images to identify the weeds. Distinguished from other oxygen weeds by conspicuous toothed leaves. Unfortunately, weeds are often excellent at surviving and reproducing and are commonly the first plants to colonise and dominate. Common garden weed, spur valerian, wreaking havoc on native vegetation in Lyttelton Harbour. Broad-leafed docks (Rumex obtusifolius) grow prolifically throughout New Zealand. 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