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Federal Noxious Weed
TDA Noxious Weed
TPWD Prohibited Exotic Species
Invasive Plant Atlas of the US

Eichhornia azurea


Anchored water hyacinth

Synonym(s):
Family: Pontederiaceae (Pickerelweed Family)
Duration and Habit: Perennial Herb


Photographer: Kurt St
Source: Max-Planck Institute for Plant breeding Research, Bugwood.org

Description

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 x 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 x 0.8-1.1 mm. Flowering (probably) Jun-Oct. Coastal rivers, lakes; 0-100 m.

Ecological Threat:

Biology & Spread:

History:

US Habitat:

Distribution

US Nativity: Introduced to U.S.

Native Origin: Introduced to U.S.

US States: PR

Mapping

Invaders of Texas Map: Eichhornia azurea
EDDMapS: Eichhornia azurea
USDA Plants Texas County Map: Eichhornia azurea

Resembles/Alternatives

Management

USE PESTICIDES WISELY: ALWAYS READ THE ENTIRE PESTICIDE LABEL CAREFULLY, FOLLOW ALL MIXING AND APPLICATION INSTRUCTIONS AND WEAR ALL RECOMMENDED PERSONAL PROTECTIVE GEAR AND CLOTHING. CONTACT YOUR STATE DEPARTMENT OF AGRICULTURE FOR ANY ADDITIONAL PESTICIDE USE REQUIREMENTS, RESTRICTIONS OR RECOMMENDATIONS. MENTION OF PESTICIDE PRODUCTS ON THIS WEB SITE DOES NOT CONSTITUTE ENDORSEMENT OF ANY MATERIAL.

Online References

Google Search: Eichhornia azurea
Google Images: Eichhornia azurea
NatureServe Explorer: Eichhornia azurea
USDA Plants: Eichhornia azurea
Invasive Plant Atlas of the United States: Eichhornia azurea
Bugwood Network Images: Eichhornia azurea

Text References

Romero-Gonzalez G.A., G.C. Fernandez-Concha, R.L. Dressler, L.K. Magrath and G.W. Argus. 2008. Fora of North America: Eichhornia azurea (Swartz) Kunth, Eichhornia. 4. 1842. Accessed 21 Novemeber 2008: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220004607

Data Source

Last Updated: 2008-11-24 by LBJWFC
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