Very High
The genus name Echinodorus is derived from the Ancient Greek echninos (hedgehog) and doros (bag, leather bottle)2, referring to the spiny achenes/ovaries in some species, forming a prickly head of fruit1.
1 The Botanary at Dave’s Garden
2 California Plant Names: Latin and Greek Meanings and Derivations. A Dictionary of Botanical and Biographical Etymology. Compiled by Michael L. Charters
3 Kew Gardens | World Checklist of Selected Plant Families