Hawaiian Ecosystems at Risk project (HEAR)

Pistia stratiotes
(Araceae)

Nile cabbage, tropical duckweed, water cabbage, water lettuce

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Species description or overview Taxonomy & nomenclature Impacts Control methods Legislation/regulation
Images Distribution Cited as invasive (on a list) Books In the news
Full-text articles Experts Other resources    

HEAR CLOSING      HEAR CLOSING      HEAR CLOSING

A message from Dr. David Duffy, Pacific Cooperative Studies Unit (PCSU), University of Hawaii (posted 05 November 2012):

Because of a lack of funds, HEAR (www.hear.org) may close as soon as December 15, although there may be enough funds to extend it until February 15. This will mean several things. The web site will be placed on a new server although it is not clear who will pay for the server or for transitioning the site. HEAR data will not be updated. The Pacific Ecosystems at Risk (PIER) (http://www.hear.org/pier/abtproj.htm) site will also become frozen, as will numerous books, reports and papers (http://www.hear.org/). As software evolves we will likely lose the ability to access the data. The various list servers will need new owners, otherwise moderated lists will cease to function altogether, while other lists will not be able to add or delete members. The photo collection (http://www.hear.org/starr/images/?o=plants) will remain accessible, but only through a third party site that will charge for access.

I should point out that we have already lost the original homes of both the Pacific Basin Information Node (PBIN) and Pacific Ecosystems at Risk (PIER) although they have found temporary refuges. Together with HEAR, they represent the corporate memory both here in Hawaii and across the Pacific of efforts to sustain our natural ecosystems and agriculture against problems caused by species alien to the islands. HEAR also serves as the glue that holds the community together, providing information and facilitating communication. I just hope hindsight is kind to this decision.

PLEASE SEND YOUR COMMENTS/SUGGESTIONS TO webmaster@hear.org

Let us know if you have suggestions for additional references to add to this page.

Pistia stratiotes is native to Africa and South America. 

Species description or overview

Pistia stratiotes information from PIER
Information on Pistia stratiotes as relevant to Pacific Islands is provided by the Pacific Island Ecosystems at Risk project (PIER).

Pistia stratiotes description and ecology from GISD (ISSG)
A species description and information about the ecology of Pistia stratiotes as an invasive species is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).


Taxonomy & nomenclature

GRIN nomenclature info for Pistia stratiotes
Nomenclatural information about Pistia stratiotes is provided by USDA/ARS/NGRP/GRIN.

Pistia stratiotes information from the Smithsonian's Flora of the Hawaiian Islands
Information about Pistia stratiotes--including nomenclature and synonymy, and status and distribution in Hawaii--is provided by the "Flora of the Hawaiian Islands" website of the Smithsonian National Museum of Natural History. Links from this page include descriptive information about the species, as well as worldwide distributional information and general information about the genus.

Pistia stratiotes information from ITIS
The Integrated Taxonomic Information System ITIS provides authoritative taxonomic information on Pistia stratiotes, as well as other plants, animals, fungi, and microbes of North America and the world.

IPNI nomenclature info for Pistia stratiotes
Nomenclatural information about Pistia stratiotes is provided by The International Plant Names Index (IPNI).


Impacts

Pistia stratiotes (Araceae): species information from GCW
Information on Pistia stratiotes as relevant to Pacific Islands is provided by the Global Compendium of Weeds (GCW).

Pistia stratiotes impact information from GISD (ISSG)
Impact information regarding Pistia stratiotes as an invasive species is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).

Pistia stratiotes ("water lettuce") impact information from ISSG/GISD
Information about impacts of Pistia stratiotes ("water lettuce") as an invasive species is provided by IUCN's Invasive Species Specialist Group (ISSG) in the Global Invasive Species Database (GISD).


Control methods

Pistia stratiotes management information from GISD (ISSG)
Management information for Pistia stratiotes as an invasive species is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).


Legislation/regulation

HRS 150A-6.1: Plant import
Hawaii statute for plant importation is from hawaii.gov.


Images

Pistia stratiotes images by PT
Pistia stratiotes images are presented online by Maui photographer Philip Thomas and are freely available for noncommercial use.

Images of Pistia stratiotes (Araceae) (water lettuce)
Links to high-resolution free images of Pistia stratiotes (Araceae) (water lettuce) by Forest & Kim Starr (USGS) are available here.

Pistia stratiotes information from the Smithsonian Flora of the Hawaiian Islands
Information about Pistia stratiotes in Hawaii is available from the Smithsonian Flora of the Hawaiian Islands.

Pistia stratiotes images from PIER
Images of Pistia stratiotes provided by the Pacific Island Ecosystems at Risk project (PIER).


Distribution

Pistia stratiotes information from the Smithsonian Flora of the Hawaiian Islands
Information about Pistia stratiotes in Hawaii is available from the Smithsonian Flora of the Hawaiian Islands.

Pistia stratiotes information from the Smithsonian's Flora of the Hawaiian Islands
Information about Pistia stratiotes--including nomenclature and synonymy, and status and distribution in Hawaii--is provided by the "Flora of the Hawaiian Islands" website of the Smithsonian National Museum of Natural History. Links from this page include descriptive information about the species, as well as worldwide distributional information and general information about the genus.

Pistia stratiotes worldwide distribution from GISD (ISSG)
Worldwide distribution information about Pistia stratiotes is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).


Cited as invasive (on a list)

2007 FLEPPC invasive plant list View info about Adobe Acrobat PDF format
Florida Exotic Pest Plant Council's 2007 List of Invasive Plant Species focus includes adverse effects exotic pest plants have on Florida's biodiversity and plant communities.


Books

Identification and biology of nonnative plants in Florida's natural areas (second edition)
Langeland, K.A., H.M. Cherry, C.M. McCormick, and K.A. Craddock Burks. 2008. Identification and biology of nonnative plants in Florida's natural areas (second edition). The University of Florida IFAS Communication Services (Gainesville). 193+ pp. illus. ISBN: 978-0-916287-70-2.


In the news

Volunteers give Kailua marsh a new look
"Volunteers give Kailua marsh a new look" (Honolulu Star-Bulletin, March 23, 2003).


Full-text articles

Control of non-native plants in natural areas of Florida
Langeland, K.A. and R.L. Stocker. (1997-)2001. Control of non-native plants in natural areas of Florida. SP 242, one of a series of the Department of Agronomy, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. First printed: 1997. Revised: April, 2001.


Experts

Pistia stratiotes contacts from GISD (ISSG)
Contact information for experts on Pistia stratiotes as an invasive species is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).


Other resources

Contact information for experts on Pistia stratiotes ("water lettuce") from ISSG/GISD
online

Pistia stratiotes references from GISD (ISSG)
References regarding Pistia stratiotes as an invasive species is provided from the Global Invasive Species Database (GISD). GISD was created and is maintained by IUCN's Invasive Species Specialist Group (ISSG).


PDF icon Some documents posted on the HEAR website are in Adobe Acrobat PDF format. If your computer is not already set up to read these files, you can download the FREE Adobe Acrobat reader. You can set up most web browsers to automatically invoke this reader (as a "helper application" or "add-in") upon encountering documents of this type (refer to your browser's documentation for how to do this). download Acrobat reader


The Hawaiian Ecosystems at Risk project (HEAR) is currently funded by grants from the Hau'oli Mau Loa Foundation and the U.S. Forest Service with support from PCSU (UH Manoa). Historically, HEAR has also received funding and/or support from the Pacific Basin Information Node (PBIN) of the National Biological Information Infrastructure (NBII), PIERC (USGS), the USFWS, HCSU (UH Hilo), and HALE (NPS).

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