Click on images to enlarge
infestation (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
leaf blade (Photo: Sheldon Navie)
leaf underside (Photo: Sheldon Navie)
stem, leaf sheath and base of leaf blade (Photo: Sheldon Navie)
elongated flower cluster (Photo: Sheldon Navie)
close-up of flowers (Photo: Sheldon Navie)
close-up of immature fruit (Photo: Sheldon Navie)
close-up of seeds (Photo: Steve Hurst at USDA PLANTS Database)
Scientific Name
Pontederia cordata L.
Synonyms
Pontederia cordata L. var. cordataPontederia cordata L. var. lanceolata (Nutt.) Griseb.Pontederia lanceolata Nutt.
Family
Pontederiaceae
Common Names
blue pickerel, blue pickerel weed, blue-flag, dog-tongue, pickerel plant, pickerel rush, pickerel weed, pickerel-weed, pickerelweed, pontederia, wampee, white pickerel weed
Origin
Native to eastern Canada, eastern USA, Central America (i.e. Belize), the Caribbean (i.e. Cuba) and South America (i.e. Brazil, Colombia, Argentina, Paraguay and Uruguay).
Naturalised Distribution
This species has a widespread but very scattered distribution in Australia. It is naturalised in some inland parts of southern New South Wales, in southern Victoria and in south-western Western Australia. It is also sparingly naturalised in south-eastern South Australia and was previously naturalised in Queensland.
Notes
Pickerel weed (Pontederia cordata) is regarded as an environmental weed in Victoria, and as a potential environmental weed or "sleeper weed" in other parts of Australia.
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