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    Aquarius bracteatus (Micheli) Christenh. & Byng

    Aquarius bracteatus (Micheli) Christenh. & Byng


    Basionym :   Echinodorus bracteatus Micheli


     Echinodorus bracteatus subsp. bracteatus

    Echinodorus bracteatus subsp. efenestratus (Fassett) R.R.Haynes & Holm-Niels.

    Echinodorus bracteatus var. bracteatus

    Echinodorus bracteatus var. efenestratus Fassett[1]


    Central America and coastal plains of Ecuador.


    Grows in shallow, stagnant waters in swampy habitats. From sea level to 300 m.

    Morphology General habit

    Perennial, from rhizomes, petioles and stems glabrous to rough, up to 210 cm, rhizomes up to 8 cm long, 3 cm diam. Leaves emersed, leaf blade broadly ovate, 9 - 11-veined, wavy, 10 - 36 cm long, 7 - 30 cm wide, translucent markings absent or present as dots and short lines, apex round to pointed, base cordate, petioles round, furrowed , up to 75 cm long, 0.5 - 1 cm diameter, base with sheath up to 13 cm long

    Morphology Reproductive morphology Fruits

    Fruit oblique, 3 - 5-ribbed, slightly keeled, glandular, 1.6 - 2.7 mm long, 1 mm wide, glands 0 - 2, circular, separated by ribs, beak end, erect, 0.2 - 0.5 mm.

    Morphology Reproductive morphology Inflorescences

    Inflorescence paniculate, of 8 - 21 whorls, each 5 - 25-flowered, erect, protruding leaves, proliferating, up to 150 cm long, up to 45 cm wide, rachis triangular in cross-section, broadly pinnate, pedicels corrugated, up to 90 cm long, 1.5 cm diam, bracts free, lanceolate, longer than pedicels, up to 6.5 cm long, 0.4 - 1 cm wide, 17 - 30-veined, long pointed tip, pedicels spread out in flower, bent back in fruit, 0.2 - 1 cm long, c. 0.5 mm diam. flowers 1.5 - 3.5 cm in diameter, sepals erect, 13 - 20-veined, approx. 4 mm long, c. 4 mm wide, veins without papillae, petals spreading, white, not clawed, overlapping, c. 18 mm long, c. 15 mm wide, stamens 15 - 18, anthers many-sided, c. 1.5 mm long, filaments c. 2 mm long, carpels numerous


    Fassett (1955), Rataj (1975, but not 2004) and Haynes & Holm-Nielsen (1986, 1994) divided this taxon into two subspecific taxa. This distinction was based on the presence or absence of pubescence and pellucid markings. However, individuals with features of both types and a mixed set of characters can be found from the same populations. There was also no significant molecular difference between the proposed subspecies (Lehtonen & Myllys 2008), so no subspecies are recognized here.


    Flowering and fruiting throughout the year.[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. 1498752407776yD7zzkzxousgZs8g (4284×6143) (
    4. "Echinodorus bracteatus Micheli - Nicaragua, Zelaya Dept. (BARCODE: 171410) - USF Herbarium"
    5. The New York Botanical Garden
    6. 6.0 6.1 6.2 6.3 6.4 6.5 BM001191179" - Echinodorus bracteatus MicheliCollected in Panama by The Trustees of the Natural History Museum, London