Eichhornia azurea (Sw.) Kunth
Rooted Water-Hyacinth; Peacock-Hyacinth
Life   Plantae   Monocotyledoneae   Pontederiaceae   Eichhornia

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Eichhornia azurea (Sw.) Kunth
anchored water hyacinth

Image of Eichhornia azurea

General Information
Symbol: EIAZ2
Group: Monocot
Family: Pontederiaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : L48   I
PR   I
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Eichhornia thumbnails at the Plants Gallery




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Liliidae
Order Liliales
Family Pontederiaceae – Water-Hyacinth family
Genus Eichhornia Kunth – water hyacinth
Species Eichhornia azurea (Sw.) Kunth – anchored water hyacinth

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
United States : anchored waterhyacinth Noxious weed
Alabama anchored waterhyacinth Class A noxious weed
Arizona anchored water hyacinth Prohibited noxious weed
California anchored waterhyacinth Quarantine
Florida Eichhornia
waterhyacinth Prohibited aquatic plant, Class 1
Massachusetts anchored waterhyacinth Prohibited
North Carolina anchored waterhyacinth Class A noxious weed
Oregon anchored waterhyacinth Quarantine
South Carolina rooted water hyacinth Invasive aquatic plant anchored waterhyacinth, rooted waterhyacinth Plant pest
Texas rooted waterhyacinth Noxious plant
Vermont anchored waterhyacinth Class A noxious weed
U.S. Weed Information
Eichhornia Eichhornia azurea anchored water hyacinth This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
US USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ). 2012. Federal noxious weed list (1 February 2012). USDA, APHIS, PPQ. Washington, DC.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Caribbean OBL
North America
Atlantic and Gulf Coastal Plain OBL
Great Plains OBL

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (EIAZ2)
CalPhotos (EIAZ2)
Flora of North America (EIAZ2)
Integrated Taxonomic Information System (EIAZ2)
Related Websites
Eichhornia photos from Japan (EIAZ2)
Texas A&M: Vascular Plant Image Gallery (EIAZ2)
http://florida.plantatlas.usf.edu (EIAZ2)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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Link to Flora of North America home
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FNA Vol. 26 Page 39, 40 , 41 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 26 | Pontederiaceae | Eichhornia

2. Eichhornia azurea (Swartz) Kunth, Eichhornia. 4. 1842.

Rooted water-hyacinth

Pontederia azurea Swartz, Prodr., 57. 1788

Plants perennial, typically rooted in mud. Vegetative stems elongate, developing to and growing at water surface. Flowering stems erect, 8—12 cm, glabrous, distal inter-node 2—10 cm. Sessile leaves submersed, alternate on elongate stem. Petiolate leaves emersed; stipule 7—13 cm, apex truncate; petiole never inflated, 11—25 cm; blade round, 7—16 × 2.3—16 cm. Spikes 7—50-flowered, individual flowers open 1 day only; spathes obovate, 3—6 cm; peduncle 1.9—15 cm, pubescent with orange hairs. Perianth blue or white, limb lobes obovate, 13—25 mm, margins erose, central distal lobe dark blue at base with yellow distal spot; proximal stamens 15—29 mm, distal 6—20 mm; anthers 1.2—2.3 mm; style 3-lobed. Seeds 10—13-winged, 1—1.8 × 0.8—1.1 mm.

Flowering (probably) Jun--Oct. Coastal rivers, lakes; 0--100 m; introduced; Fla.; Central America to South America (n Argentina).

Eichhornia azurea is on the USDA/APHIS noxious weeds list (D. C. Schmitz 1990) and is known only as a waif from several locations in Florida (R. G. Westbrooks 1990). It has been reported from Texas (L. H. Shinners 1962b), but this record was based on a misidentified specimen (Jones 1160, SMU) that actually is E. crassipes. All known populations in Florida have been eradicated by the Florida Department of Natural Resources. R. G. Westbrooks specifically noted a population growing in a residential estate pool in Palm Beach that was eradicated in June 1988. Another collection from Columbia County (N. Coile 5793, NBYC) was also eradicated.

The breeding system of Eichornia azurea, a tristylous species, is more like that of Pontederia species than that of E. crassipes (S. C. H. Barrett 1978). Populations typically have a mix of all three floral morphs, allowing for outcrossing. The above description is based on South American material.

Following modified from CalPhotos
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CalPhotos     Photo Database


Number of matches : 1
Query: SELECT * FROM img WHERE ready=1 and taxon like "Eichhornia azurea%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Eichhornia azurea
Eichhornia azurea
Anchored Water Hyacinth
ID: 0175 3301 2283 0080 [detail]
© 2001 CDFA

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