Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In Rataj's classification Echinodorus argentinensis is in Section Cordifolii, Subgenus Echinodorus. Other authorities question the specific rank of this species. Emerse leaves erect, long-petioled, 80-120 cm long. Blade ovate, at the tip shortly acuminate, at the base abrupt, or regularly oval, at the tip blunt or incised, 15 - 26 cm x 7 - 15 cm wide with 7 - 13 veins and distinct pellucid lines. Submersed leaves on short petioles, blades oval or ovate, on both ends acuminate or blunt. This species has two forms.

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