Lehmann, mid, J, 15
A Manual of the Botany of the Northern United States 23: 460. 1848. (Manual
isonym. Echinodorus Rich. was recommended as validly published by The Nomenclature Committee for Vascular Plants, see Applequist, Taxon 61(5): 1117 (2012).
The name data was provided by WCSP, World Checklist of Selected Plant Families, facilitated by the Royal Botanic Gardens, Kew (http://apps.kew.org/wcsp/