IUCN threat status:

Not evaluated

Comments

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.

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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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