Invasives

Page 6 of 8, Total records 720

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Species Description Photo
Pittosporum taitense (Wild Coffee) Pittosporum undulatum is an evergreen tree that is often used as an ornamental plant, due to its attractive fragrant flowers. It is native to south-eastern Australia but has now spread to a number of ...
Pittosporum viridiflorum (cape cheesewood) Pittosporum viridiflorum is a shrub/tree that has become naturalised in Hawai'i and Saint Helena. Originally cultivated in Europe as early as the 17th Century, the Dutch took the species to Sa ...
Pluchea carolinensis (cure for all) Pluchea carolinensis is a 1 to 2.5 metre high shrub. It usually occurs in open and disturbed areas, such as roadsides and pastures. This fast-growing shrub can form dense stands in dry habitats. It ca ...
Pluchea indica (Indian camphorweed) Pluchea indica is a shrub that grows up to 2 meters high. With its rapid growth, it can quickly form dense stands, particularly in wetlands, and alter the habitat for certain species of birds. It may ...
Poa pratensis (Kentucky bluegrass) Kentucky bluegrass (Poa pratensis) is a rhizomatous grass that is regarded as a crop in some systems, but as a weed in others. It is highly valued as a pasture and turf grass, particularly in g ...
Poecilia reticulata (millions fish) Poecilia reticulata is a small benthopelagic fish native to Brazil, Guyana, Venezuela and the Caribbean Islands. It is a popular aquarium species and is also commonly used in genetics research. In the ...
Polistes chinensis subsp. antennalis The Asian paper wasp (Polistes chinensis antennalis) is native to areas of Japan and China and is currently a widespread introduced species in New Zealand. Research on its impact on native faun ...
Polygala paniculata (orosne) A native of tropical America, Polygala paniculata naturalises easily in disturbed areas such as roadsides, forest edges and wasteland. It can spread very rapidly and soon becomes invasive. The species ...
Truellum perfoliatum (mile-a-minute weed) Polygonum perfoliatum is an herbaceous, annual, trailing vine of the buckwheat family (Polygonaceae) that is native to Asia. It generally colonises open and disturbed areas, along the edges of woods, ...
Polysiphonia brodiei (Red algae) Polysiphonia brodiei (red macroalga) is a common red alga with filamentous branches. It is abundant in northern Europe and has been introduced via ships to North America, Australia, New Zealand and Ja ...
Pomacea canaliculata (Apple snail) Pomacea canaliculata is a freshwater snail with a voracious appetite for water plants including lotus, water chestnut, taro and rice. Introduced widely from its native South America by the aquarium tr ...
Populus alba (Silver-leaf poplar) Populus alba is a member of the willow family (Salicaceae) that is native to Eurasia. It is a dioecious species and female mature trees can produce large seed crops. Populus alba spreads to new locati ...
Porcellio scaber (Sow bug) The terrestrial crustacean Porcellio scaber was first recorded on the sub-Antarctic Marion Island during a survey in April 2001. Searches conducted between September 2001 and April 2002 yielded as man ...
Porphyrio porphyrio (Purple Swamphen) The ecological similarity of the purple swamphen (Porphyrio porphyrio) to the Florida native common moorhen (Gallinula chloropus) and purple gallinule (Porphyrula martinica) have ...
Potamocorbula amurensis (Amur river clam) The suspension-feeding clam, Potamocorbula amurensis is native to Japan, China and Korea in tropical to cold temperate waters. Known as the Asian or Chinese clam, it has been designated as a major bil ...
Potamogeton crispus (curly pondweed) Potamogeton crispus is an aquatic plant that grows in fresh and slightly brackish waters. It becomes invasive in some areas because of its tolerance to low light and low water temperatures. These tole ...
Potamogeton perfoliatus (claspingleaf pondweed) Potamogeton perfoliatus is a submerged aquatic plant that occurs in still and flowing freshwaters in temperate climates. It is known as clasped pondweed as the leaf bases perfoliate (are wrapped aroun ...
Potamopyrgus antipodarum (New Zealand mud snail) Potamopyrgus antipodarum is an aquatic snail native to New Zealand that has invaded Australia, Europe, and North America. It can inhabit a wide range of ecosystems, including rivers, reservoirs ...
Procambarus clarkii (red swamp crawfish) Procambarus clarkii is a highly adaptable, tolerant, and fecund freshwater crayfish that may inhabit a wide range of aquatic environments. It is native to parts of Mexico and the United States ...
Procyon lotor (Raccoon) Procyon lotor (raccoon) is an omnivorous mammal native to North America that has been introduced in many countries. Long seen as an endemic in several Caribbean islands (Bahamas, Barbados and Guadelou ...
Prosopis glandulosa (Texas mesquite) Prosopis glandulosa (mesquite) is a perennial, woody, deciduous shrub or small tree. It forms impenetrable thickets that compete strongly with native species for available soil water, suppress grass g ...
Prosopis juliflora (mesquite) Members of the genus Prosopis spp., which are commonly known as mesquite or algarrobo, include at least 44 defined species and many hybrids. This leads to problems with identification. For this reason ...
Prunus campanulata (Taiwan cherry) Prunus campanulata is a flowering cherry that is native to China, Taiwan and Vietnam. It is a popular ornamental tree for both private gardens and public areas. One of the earliest of the flowe ...
Pseudodiaptomus inopinus Pseudodiaptomus inopinus is endemic to the Indo-Pacific region including southeast Asia. It was introduced to Pacific Northwest estuaries via ballast water between 1980 and 1990 and has rapidly expand ...
Psidium cattleianum (Cattley guava) Psidium cattleianum is native to Brazil, but has been naturalised in Florida, Hawaii, tropical Polynesia, Norfolk Island and Mauritius for its edible fruit. It forms thickets and shades out native ve ...
Psidium guajava (common guava) Psidium guajava is a tropical tree or shrub. It is native to central America from Mexico to northern South America. It has been introduced to most tropical and sub-tropical locations around the world ...
Psittacula krameri (Rose-ringed Parakeet) The rose-ringed parakeet, Psittacula krameri, is native to central Africa and Asia and is a colourful, distinctive-looking bird. It is known as one of the most successful avian invaders in the ...
Psoralea pinnata (Dally Pine) Psoralea pinnata is a slender, medium-sized shrub that occurs in riparian habitats along creeks and rivers, in waste land and disturbed natural vegetation. Any disturbance for e.g. a fire incid ...
Pteris cretica (Cretan brake) Pteris cretica commonly known as Cretan brake is a variegated green fern that has been widely distributed as an ornamental species. The native range of P. cretica is unclear; it has an ...
Pterois volitans (firefish) The Indo-Pacific red lionfish (Pterois volitans) is a beautiful but dangerous tropical fish that has spread to new marine environments through the aquarium trade. The lionfish has invaded the N ...
Pterygoplichthys ambrosettii (Catfish) Pterygoplichthys spp. are popular aquarium catfish native to South America that have established in locations throughout the world as a result of aquarium trade and their release or escape. Inv ...
Pterygoplichthys disjunctivus (Vermiculated sailfin catfish) ...
Pterygoplichthys gibbiceps (Sailfin pleco) Gonipterus scutellatus, or the eucalyptus snout beetle, is native to Australia. It is specific to Eucalyptus species, and G. scutellatus is considered to be one of the major defol ...
Pterygoplichthys multiradiatus (Sailfish catfish) ...
Pterygoplichthys pardalis (Amazon sailfin catfish) ...
Pueraria montana var. lobata (Kudzu) Kudzu (Pueraria montana var. lobata) roots can eventually comprise over 50% of the plant’s biomass, serving as an organ for carbohydrate storage for recovery after disturbance an ...
Pycnonotus cafer (Red-vented Bulbul) Pycnonotus cafer (red-vented bulbul) is a noisy, gregarious bird distinguished by a conspicuous crimson patch below the root of the tail. It is aggressive and chases off other bird species and may al ...
Pycnonotus jocosus (Red-whiskered Bulbul) Pycnonotus jocosus (red-whiskered bulbul) is a bird native to Asia which has become invasive to several parts of the world. It has been found to damage crops, compete with native species and spread in ...
Pylodictis olivaris (Flathead catfish) Pylodictis olivaris is one of the largest members of the catfish family and its introduction is the most biologically harmful of all fish introductions in North America as it predates heavily on nativ ...
Pyrus calleryana (Callery Pear) Native to Asia, Pyrus calleryana is one of the most commonly used ornamental trees in the urban landscape in the United States. Early forms of cultivated Pyrus calleryana were thought ...
Quadrastichus erythrinae Unusual growths, caused by the Erythrina gall wasp (Quadrastichus erythrinae), on leaves and young shoots of coral trees (Erythrina spp). alerts to the presence of this emerging invasive species. Q. e ...
Radumeris tasmaniensis (yellow-flower wasp) The yellow-flower wasp, Radumeris tasmaniensis, is native to Australia and Papua New Guinea. It is a solitary ectoparasite of beetles in the Scarabaeidae family; laying its eggs on the paralyse ...
Ramphotyphlops braminus (Flowerpot Snake, Brahminy blindsnake, Bootlace Snake) The flowerpot snake (Ramphotyphlops braminus) has been introduced around the world in nursery materials through the nursery trade. It is found in garden soils. ...
Rangia cuneata (Atlantic rangia) Rangia cuneata clams inhabit low salinity estuarine habitats and are, as such, most commonly found in areas with salinities from 5-15 PSU. Along the Mexican Gulf coast, they form the basis for an econ ...
Rangifer tarandus (caribou) Introduced intentionally to the subantarctic islands of Kerguelen and South Georgia, populations of Rangifer tarandus (reindeer) have had a significant impact on native vegetation of the islands due t ...
Ranunculus ficaria (fig buttercup) Ranunculus ficaria is a perennial plant and spring ephemeral (lasting for a very short time) that spends much of the year underground as thickened tubers. In the North American region, native ephemera ...
Raoiella indica (red palm mite) Raoiella indica (the red palm mite) is a parasitic mite invasive in the Caribbean region; it poses a serious threat to many plant industries. Its recent invasion is referred to as the biggest mite exp ...
Rattus exulans (Polynesian rat) The Pacific rat is the smallest of the three rats closely associated with humans. The fur is brown and its tail length is only slightly longer or shorter than the combined head and body length. Rattus ...
Rattus norvegicus (Norway rat) The Norway rat (Rattus norvegicus) is globally widespread and costs primary industry hundreds of millions of dollars per year. It has caused or contributed to the extinction or range reduction of nati ...
Rattus rattus (black rat) A native of the Indian sub-continent, the ship rat (Rattus rattus) has now spread throughout the world. It is widespread in forest and woodlands as well as being able to live in and around buildings. ...
Rauvolfia vomitoria (poison devil's-pepper) Rhamnus alaternus is an evergreen tree native to the Mediterranean. It was introduced to many areas of the Australasian-Pacific region as an ornamental plant in the 1900s where it became an invasive t ...
Rhamnus cathartica (Hart's thorn) Rhamnus cathartica commonly known as common or European buckthorn is a deciduous small tree that prefers lightly shaded conditions. It is tolerant of many soil types and can be found in open oak wood ...
Rhaponticum repens (Russian Knapweed) Acroptilon repens is native to Mongolia, western Turkestan, Iran, Turkish Armenia and Asia Minor and is now present on every continent. It is severely invasive in Europe, USA and Canada. It is commonl ...
Rhithropanopeus harrisii (estuarine mud crab) Rhithropanopeus harrisii is a small estuarine crab native to the Atlantic Coast of North America. It has invaded many locations in Europe and North America and is presumed to have dispersed mainly via ...
Rhizophora mangle (American mangrove) Rhizophora mangle (the red mangrove) is a coastal, estauarine species that can tolerate saltwater and extended flooding. It commonly forms monoculture stands in its native range, or is associated with ...
Rhodomyrtus tomentosa (rose myrtle) Rhodomyrtus tomentosa is a large evergreen shrub native to Southeast Asia that has become an invasive species in other tropical and subtropical countries. Introduced to many areas as an ornamental pla ...
Ricinus communis (Castor-Oil Plant) Ricinus communis is a perennial shrub that can assume tree-like status if it establishes in a suitable climate. It is frequently found invading riparian areas where it displaces native vegetation. The ...
Robinia pseudoacacia (Post locust) Robinia pseudoacacia is a leguminous deciduous tree native to the southeastern United States that has been widely introduced to other parts of North America. It is commonly found in disturbed areas su ...
Rosa bracteata (Macartney rose) Rosa bracteata (Macartney rose) is an evergreen perennial shrub, native to Asia, that has been introduced to the United States as an ornamental and used for livestock containment, erosion control, enr ...
Rottboellia cochinchinensis (itch grass) Rottboellia cochinchinensis is an erect annual grass that reaches heights of 4 metres. It is a weed of warm-season crops around the world, preferring tropical and subtropical climates. It grows along ...
Rubus alceifolius Rubus alceifolius is a climbing shrub native to Sumatra and Java that has been introduced in several islands of the Indian Ocean and Australia. When conditions are favorable, R. alceifolius develops d ...
Rubus ellipticus (yellow Himalayan raspberry) Rubus ellipticus is a thorny shrub that originates from southern Asia. It has been introduced to several places, including Hawaii, Southern USA and the UK, and is grown in cultivation for its edible f ...
Rubus phoenicolasius (Japanese Wineberry) Rubus phoenicolasius, commonly known as Japanese wineberry is native to temperate Asia; it is widely naturalised in temperate regions of the world. It was introduced into the USA in 1890 as breeding s ...
Rubus pinnatus Rubus pinnatus is reported as being exceedingly common on the island of St Helena everywhere above an elevation of 1500 feet. ...
Rubus rosifolius (roseleaf bramble) Rubus rosifolius is a prickly shrub that produces edible red berries. It is valued for a number of culinary and medicinal purposes. This species has become invasive in Hawai‘i and French Polynesia, wh ...
Ruellia brevifolia (tropical wild petunia) Ruellia brevifolia is an herbaceous perennial that can reach up to 1 metre in height. A native of tropical South America, it is grown in many countries as an ornamental. It is naturalized in Australia ...
Oxalis tenuifolia (field sorrel) Rumex acetosella is an herbaceous perennial plant which occurs in disturbed areas, such as roadsides and pastures, but also in degraded forests. A fairly common weed, it invades natural habitats more ...
Rumex crispus (narrowleaf dock) Curled dock (Rumex crispus) is a problematic weed throughout its native and introduced range. It is native to Europe and western Asia, but is now present on all continents and is considered one ...
Rumex oblongifolius (bluntleaf dock) Broad-leaved dock (Rumex obtusifolius) is a problematic weed throughout its native and introduced range. It invades a wide variety of habitats in the Sub-Antarctic region including areas dominated by ...
Rutilus rutilus (Roach) Rutilus rutilus, commonly known as the roack, is a freshwater fish that is native to many parts of Europe and Asia. It is able to cope with brackish conditions and is an omnivorous species that ...
Sabella spallanzanii (European fan worm) Sabella spallanzanii (the European fan worm) is a filter-feeding tube worm which has the potential to alter native marine ecosystems and compete with native organisms for food and space. It may also i ...
Sacciolepis indica (glenwoodgrass) Sacciolepis indica is a perennial grass. Originating from tropical Asia, Australia and Polynesia, it has been introduced to several Pacific islands, where it has become fairly common. It occurs mainly ...
Sagina procumbens (birdeye pearlwort) Sagina procumbens is a herb native to Eurasia and North Africa. It has become naturalised in temperate regions and is invasive in some sub-Antarctic islands. It forms dense mats, threatening the integ ...
Sagittaria platyphylla (delta arrowhead) Sagittaria platyphylla is a rhizomatic aquatic plant which can thrive in many aquatic habitats. It forms extensive infestations in shallow waterways, where it can seriously restrict water flow, incre ...
Sagittaria sagittifolia (Arrow Head) Sagittaria sagittifolia is a very hardy aquatic plant that has become a general nuisance in the crops' irrigation systems, drains and waterways around the globe. ...
Salix cinerea (large gray willow) Salix cinerea can be classified as a shrub or small tree. It has become particularly invasive in the Australasian-Pacific region where it is extremely hardy and tolerant of a wide range of soils and h ...
Salix humboldtiana (Humboldt's willow) Salsola tragus is an annual weed that begins life as a typical multiple branched bush but then takes on a spherical form. Once the spherical form is achieved the plant breaks at the soil line and beco ...
Salmo salar (Atlantic salmon) Salmo salar ranks among the most popularly cultivated fish in the world. Commercial stocks have inflicted significant impacts of wild populations of wild salmon and other fish by way of competition, h ...
Salmo trutta (Brown trout) Salmo trutta has been introduced around the world for aquaculture and stocked for sport fisheries. It is blamed for reducing native fish populations, especially other salmonids, through predation, dis ...
Salsola kali subsp. ruthenica (prickly Russian thistle) Salsola tragus is an annual weed that begins life as a typical multiple branched bush but then takes on a spherical form. Once the spherical form is achieved the plant breaks at the soil line and beco ...
Salvelinus fontinalis (charr) Introduced as a highly desirable fish for both angling and aquaculture throughout the world, Salvelinus fontinalis (brook trout) is an invasive that threatens native amphibians and fish, as well as th ...
Salvelinus namaycush (American lake char) Salvelinus namaycush is a freshwater fish of the trout family, found primarily in lakes and large rivers worldwide. The distribution is broad due to the sport fishing industry and the demand for Salve ...
Salvinia minima (water fern) Salvinia minima is a floating aquatic fern that invades a variety of aquatic habitats with salinity levels as high as 4-7ppt. Salvinia minima experiences exponential growth that allows it to completel ...
Salvinia adnata (aquarium watermoss) Salvinia molesta is a floating aquatic fern that thrives in slow-moving, nutrient-rich, warm, freshwater. A rapidly growing competitive plant, it is dispersed long distances within a waterbody (via wa ...
Sansevieria hyacinthoides (iguanatail) Sansevieria hyacinthioides is an extremely durable, and tough rhizomatous perennial. S. hyacinthioides has escaped in Florida, where it is listed by the Florida Exotic Pest Plant Council as a Category ...
Sansevieria trifasciata (viper's bowstring hemp) Native to tropical Africa Sansevieria trifasciata is now widely cultivated and naturalized. In Hawai‘i, it has spread vegetatively from areas where it has been cultivated. ...
Sargassum muticum (Strangle weed) Sargassum muticum is a large brown seaweed that forms dense monospecific stands. It can accumulate high biomass and may quickly become a strong competitor for space and light. Dense Sargassum muticum ...
Sarotherodon occidentalis (Nile perch) Sarotherodon occidentalis is a fish which originates in the rivers of west Africa and resembles tilapia. It is a predator which, once introduced, threatens native fish and invertebrate species. In New ...
Scaevola sericea (beach naupaka) Beach naupaka (Scaevola sericea) is a dominant shrub species present in tropical and subtropical coastal environments, including sand dune, mangrove and seagrape habitats and ruderal land. Nati ...
Scardinius erythrophthalmus (Red-eye) Scardinius erythrophthalmus (rudd) are mainly herbivorous freshwater fish that are found throughout Eurasia. They have been introduced to a number of countries as a sport fish. Concerns have been rais ...
Schefflera actinophylla (octopus tree) The ornamental tree Schefflera actinophylla has been introduced to numerous regions. Reaching between 20 and 30 metres in height, its many fruits are actively spread by frugivorous birds. Schefflera a ...
Schinus terebinthifolius (Florida holly) Native to Argentina, Paraguay and Brazil, Schinus terebinthifolius is a pioneer of disturbed sites, but is also successful in undisturbed natural environments. It is an aggressive evergreen shrub or s ...
Schismus arabicus (Arabian schismus) Schismus arabicus is a small ephemeral plant that is a problem weed in arid environments, such as the Mojave and Sonoran deserts. It germinates and produces seed in seasons when native annual species ...
Schismus barbatus (Mediterranean grass) Schismus barbatus is invasive in the Mojave and Sonoran Deserts of the southwestern United States. However, this species also provides food for desert turtles and rodents. It is most common in disturb ...
Schizoporella errata Schizoporella errata is a heavily calcified, encrusting cheilostome bryozoan. It colonises most freely available substratum, including artificial underwater structures and vessel hulls. Colonies may r ...
Schizoporella unicornis (Marine bryozoan) Schizoporella unicornis, or single horn bryozoan, is an encrusting bryozoan native to Japan. It has been unintentionally introduced along with the Pacific oyster (Crassostrea gigas), or by hull foulin ...
Scinax ruber (Red Snouted Treefrog) Scinax ruber is an arboreal, nocturnal frog which is frequently observed in disturbed or human modified areas. It reproduces throughout the year, with a peak during the rainy season. Scinax ruber thre ...
Scinax x-signatus Scinax x-signatus is a frog species originating from the forests of South America. It occurs in low altitude moist forests, moist savannas, wetlands, pastures, gardens and highly degraded habitats. Si ...
Sciurus carolinensis (eastern gray squirrel) The grey squirrel (Sciurus carolinensis) is native to deciduous forests in the USA and has been introduced to the UK, Ireland, Italy and South Africa. In the introduced range grey squirrels dam ...
Scolopendra morsitans (Common centipede) The millipede Scolopendra morsitans is believed to be at least partly responsible for the decline of the 'Critically Endangered (CR)' St Helena giant earwig (see
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Invasive Status provided by Global Invasive Species Database Downloaded on 10 May 2011.