Comparison of Uredo eichhorniae, the Water-Hyacinth Rust, and Uromyces pontederiae

Abstract
The occurrence of Uredo eichhorniae on Eichhornia crassipes in Argentina is reconfirmed; it is compared with Uromyces pontederiae from localities in Argentina and Uruguay [South America] and Florida (USA). The pickerelweed rust [U. pontederiae] was collected from Pontederia cordata L. and P. lanceolata Nutt. Some consider the 2 as ecotypes of P. cordata.

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