Hawaiian Ecosystems at Risk project (HEAR)

Ludwigia octovalvis
(Onagraceae)

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"The seeds of this species originally could have been brought to Hawaii unintentionally by Polynesians on taro plants; however, they could just as easily have been brought by migratory water birds such as ducks. Hillebrand (1888) treated it as indigenous." "First collected [ed.: in Hawaii] (without definite locality) in 1794...." (Wagner et al. 1999. Manual of flowering plants of Hawaii. p. 998)  Ludwigia octovalvis is native to Pantropical. 


Species description or overview

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


Taxonomy & nomenclature

GRIN nomenclature info for Ludwigia octovalvis
Nomenclatural information about Ludwigia octovalvis is provided by USDA/ARS/NGRP/GRIN.

Ludwigia octovalvis information from the Smithsonian's Flora of the Hawaiian Islands
Information about Ludwigia octovalvis--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.

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

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


Impacts

Ludwigia octovalvis (Onagraceae): species information from GCW
Information on Ludwigia octovalvis as relevant to Pacific Islands is provided by the Global Compendium of Weeds (GCW).


Images

Images of Ludwigia octovalvis (Onagraceae) (primrose willow)
Links to high-resolution free images of Ludwigia octovalvis (Onagraceae) (primrose willow) by Forest & Kim Starr (USGS) are available here.

Ludwigia octovalvis information from the Smithsonian Flora of the Hawaiian Islands
Information about Ludwigia octovalvis in Hawaii is available from the Smithsonian Flora of the Hawaiian Islands.

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


Distribution

Ludwigia octovalvis information from the Smithsonian Flora of the Hawaiian Islands
Information about Ludwigia octovalvis in Hawaii is available from the Smithsonian Flora of the Hawaiian Islands.

Ludwigia octovalvis information from the Smithsonian's Flora of the Hawaiian Islands
Information about Ludwigia octovalvis--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.


Books

Weed handbook of Western Polynesia
Whistler, W. Arthur. 1983. Weed handbook of Western Polynesia. Eschborn: Deutsche Gesellschaft f#r Technische Zusammenarbeit (GTZ) GmbH. ISBN: 3-88085-227-8.


Full-text articles

Alien plant invasions in native ecosystems of Hawaii: Management and research
Stone, Charles P., Clifford W. Smith, and J. Timothy Tunison (eds.) . 1992. Alien plant invasions in native ecosystems of Hawaii: Management and research. Honolulu: University of Hawaii Cooperative National Park Resources Studies Unit. ISBN: 0-8248-1474-6.

Phenology, reproductive potential, seed dispersal and predation, and seedling establishment of three invasive plant species in a Hawaiian rain forest
Medeiros, A.C. 2004. Phenology, reproductive potential, seed dispersal and predation, and seedling establishment of three invasive plant species in a Hawaiian rain forest. Ph.D. Dissertation, Department of Zoology, University of Hawaii at Manoa, Honolulu.

Revised List of Hawaiian Names of Plants Native and Introduced with Brief Descriptions and Notes as to Occurrence and Medicinal or Other Values
Gon III, Samuel M. Ohukaniohia. 2008. Revised List of Hawaiian Names of Plants Native and Introduced with Brief Descriptions and Notes as to Occurrence and Medicinal or Other Values, by Joseph F. Rock Consulting Botanist, Board of Agriculture and Forestry Honolulu, Hawaii, 1920; transcribed and annotated by Samuel M. Ohukaniohia Gon III. Ethnobotany Research & Applications 6:405-442.


Other resources

Phenology, reproductive potential, seed dispersal and predation, and seedling establishment of three invasive plant species in a Hawaiian rain forest
After rain forest of Haleakala National Park was fenced in the late 1980s, native vegetation responded vigorously yet three problematic plant invaders (Clidemia hirta, Hedychium gardnerianum, and Psidium cattleianum) continued to spread unabated and became of great concern to Park managers. This contribution provides a quantitative assessment of crucial life history junctures (quantitative phenology, reproductive potential, seed dispersal, seed predation, seedling establishment) to assist Haleakala NP and other managers of Hawaiian rain forests. It also provides detailed information for potentially identifying key characteristics in prevention, rapid response, and prioritization of incoming invasive species. (This document is the 2004 Ph.D. dissertation of Dr. Arthur C. Medeiros for the Department of Zoology at the University of Hawaii.)


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The Hawaiian Ecosystems at Risk (HEAR) project was historically funded by the Pacific Basin Information Node (PBIN) of the National Biological Information Infrastructure (NBII) through PIERC (USGS) with support from HCSU (UH Hilo). More details are available online. Pacific Basin Information Node (PBIN) National Biological Information Infrastructure (NBII)

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