The genus Eichhornia was established by C.S. Kunth, a german botanist in 1842, to design the members of the family Pontederiaceae with trilocular ovary a numerous seeds per fruit. He named it in honour of John Albert Friedrich Eichhorn, the Prussian Minister for Education, Culture and Medicine. Today the genus Eichhornia comprises eight spices, most of them no yet well known, but by the earlier systematic descriptions, having not received enough attention concerning morphology and floral biology. Besides this Eichhornia crassipes and Eichhorna azurea have received much more. The two species were widespread in the early 19th century in South America, and they exhibit great phenotypic variation in thabit, flower colour and other characters which overlap in the two species creating taxonomic confusion. In order to contribute to make easy recognition of both species and identification among the rest of the members of the genus, we present a Diagnostic Key and Table of Identification Characters. Nomenclatural data offered will also help to outline the taxonomic position of Eichhornia crassipes and Eichhornia azurea.
Auteurs du document :
RUIZ TELLEZ Trinidad
Obtenir le document :
Grupo de Investigación en Biología de la Conservación