Echinodorus andrieuxii

Echinodorus andrieuxii (Hook. & Arn.) Small, Andrieux's sword plant, is regarded as a synonym of the winged sword plant E. subalatus, now Aquarius subalatus.¹²³⁶ Rataj treated the taxon as a separate species, Haynes and Holm-Nielsen as the subspecies E. subalatus subsp. andrieuxii;⁴⁵⁶ for Kasselmann the merger, carried out by Lehtonen in 2008 despite failed molecular studies, still needs clarification.⁶ The species ranges from Mexico and Cuba to Bolivia, Paraguay and Brazil.²

Its light green, linear to strap-shaped submersed leaves are relatively long-stalked; in the aquarium the rosette grows approx. 30–50 cm tall.⁵⁶ Considered easy, the species can be kept in soft or moderately hard water and shows to advantage in an unobstructed, bright position in the background or semi-emersed in open tanks.⁵⁶ Older, vigorous specimens may change to the terrestrial form.⁵

1. Echinodorus andrieuxii – Flowgrow aquatic plant database (accessed 5 October 2026)
2. Aquarius subalatus – Plants of the World Online, Royal Botanic Gardens Kew (WCVP data as of 4 June 2026, accessed 5 October 2026)
3. Echinodorus andrieuxii (Hook. & Arn.) Small – EchiPedia (accessed 5 October 2026)
4. Echinodorus subalatus (Mart.) Griseb. – EchiPedia (accessed 5 October 2026)
5. Echinodorus subalatus – Flowgrow aquatic plant database (accessed 5 October 2026)
6. Kasselmann, C. (2019): Aquarienpflanzen. 4th edition (German). - Ulmer Verlag, Stuttgart: p. 323.