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Alismataceae
Echinodorus

not marked as a favorite taxon Echinodorus L.C. Richard ex Engelmann. Common name: Burhead.

Key to Echinodorus

A genus of about 27 species, herbs, primarily of the American tropics and subtropics. Christenhusz, Fay, & Byng (2018) proposed splitting Echinodorus into two genera, Echinodorus (consisting of E. berteroi only), and Aquarius Christenhusz & Byng (consisting of all other species of Echinodorus), allegedly based on the results of Lehtonen & Myllys (2008). Lehtonen & Myllys's (2008) results are ambiguous, however, and it does not appear that this split is well-founded. Li et al. (2022) sampled four species of Echinodorus, and E. berteroi was "basal" to a clade of the other three, providing ambiguous support to the idea of separating the two genera, but there results contradicted Christenhusz, Fay, & Byng's (2018) contention that Echinodorus berteroi "is found separate from the remainder of Echinodorus, often with other genera like Albidella, Alisma or Baldellia interdigitated". We retain the traditional circumscription of Echinodorus.

Glossary (beta!)

References: Christenhusz, Fay, & Byng (2018); Haynes & Hellquist (2000a) In Flora of North America Editorial Committee (2000); Haynes, Les, & Holm-Nielsen (1998a) In Kubitzki (1998b); Lehtonen (2008); Lehtonen (2009); Lehtonen & Myllys (2008). Show full citations.

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image #1 of Echinodorus© Bruce A. Sorrie | Echinodorus cordifolius
image #2 of Echinodorus© Gary P. Fleming | Echinodorus cordifolius | Original Image ⭷
image #3 of Echinodorus© Bruce A. Sorrie | Echinodorus cordifolius | Original Image ⭷
image #5 of Echinodorus© johnyochum, some rights reserved (CC BY), uploaded by johnyochum | Echinodorus berteroi source | Original Image ⭷

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