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    Aquarius major (Micheli) Christenh. & Byng

    Aquarius major (Micheli) Christenh. & Byng


    Basionym : Echinodorus major (Micheli) Rataj[1]

    Synonyms :  Echinodorus martii var. major Micheli


    Central Brazil.


    Grows under water in shallow streams. At altitudes of c. 500m.

    Morphology General habit

    Perennial, from rhizomes, glabrous, up to 50 cm

    Morphology Leaves

    Leaves under water, leaves obovate, wavy, 3 - 5 pseudopinnate veins, up to 30 cm long, 6 cm wide, translucent markings absent, apex round, base truncate, petioles triangular in cross-section, up to 15 cm long, 4 mm diam., base with sheath up to 3 cm long

    Morphology Reproductive morphology Fruits

    Fruit obovate, 4-ribbed, glandular, c. 2 mm long, 0.5 mm wide, glands c. 9, separated by ribs, circular, beak terminal, erect, c. 0.2 mm.

    Morphology Reproductive morphology Inflorescences

    Inflorescence racemes, 6 - 7 whorls, each 7 - 9-flowered, erect, leaves protruding, spreading, up to 25 cm long, 4 cm wide, leaf spider triangular in cross-section, pedicels round, c. 30 cm long, 5 mm diam, bracts free, lanceolate, approx. 2 cm long, 8 mm wide, approx. 13-veined, pointed tip, pedicels in flower and fruit spreading, round, 1 cm long, 0.5 mm diam. flowers 1.5 cm in diameter, sepals and petals spreading, sepals approx. 11-veined, c. 3 mm long, c. 2 mm wide, veins without papillae, petals white, without claws, not overlapping, c. 6 mm long, c. 4 mm wide, stamens 12, anthers many-sided, c. 1 mm long, filaments c. 1.5 mm long, carpels numerous


    Echinodorus major is an extremely rarely collected species, but a widespread aquarium plant. For this reason, no natural populations were available for sequencing, and a cultivated plant was used for the phylogenetic analysis (Lehtonen & Myllys 2008). Hybrids have largely replaced native species in the aquarium trade (Kasselmann 2003), so cultivated populations should be avoided in phylogenetic studies. However, no evidence was found that the specimen used in the analysis was of hybrid origin (Lehtonen & Myllys 2008).[1]

    1. 1.0 1.1 POWO (2021). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Im Internet veröffentlicht; Abgerufen am 22. August 2021."
    2. 2.0 2.1 2.2 Kostiantyn Loboda, Black Water