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    Aquarius palifolius (Nees & Mart.) Christenh. & Byng

    Aquarius palifolius (Nees & Mart.) Christenh. & Byng


    Basionym : Echinodorus palifolius (Nees & Mart.) J.F.Macbr.[1]

    Synonyms :

    Alisma ellipticum Mart. ex Schult.f.

    Alisma ellipticum var. minus Seub.

    Alisma nathpurense Steud.

    Alisma palifolium (Nees & Mart.) Kunth

    Alisma virgata Hook. & Arn.

    Echinodorus ellipticus (Mart. ex Schult.f.) Micheli

    Echinodorus ellipticus var. latifolius Micheli

    Echinodorus glandulosus Rata

    Echinodorus palifolius var. latifolius (Micheli) Rataj

    Echinodorus palifolius var. minus (Seub.) Rataj

    Echinodorus virgatus (Hook. & Arn.) Micheli

    Sagittaria palifolia Nees & Mart.

    Sagittaria palifolia var. elliptica (Mart. ex Schult.f.) Kuntze

    Sagittaria palifolia f. foliosobracteata Kuntze

    Sagittaria palifolia var. heterophylla Kuntze

    Sagittaria palifolia var. undulata Kuntze


    Eastern Brazil.


    At altitudes of 200 - 800 m.

    Morphology General habit

    Perennial, from rhizomes, petioles and stems glabrous to pubescent, up to 110 cm

    Morphology Leaves

    Leaves emersed, blade lanceolate to elliptic, 7 - 11-veined, 8 - 25 cm long, 5.5 - 20 cm wide, translucent markings absent or present as lines, apex round, base truncate to cordate, petioles canaliculate, corrugated, up to 20 - 47 cm long, 5 - 20 mm in diameter, base with sheath up to 7 cm long

    Morphology Reproductive morphology Fruits

    Fruit oblanceoloid, 5 - 6-ribbed, glandular, 1.8 - 2.5 mm long, 1 mm wide, glands 1 - 3, circular, separated by ribs, beak end, erect, 0.4 - 1 mm.

    Morphology Reproductive morphology Inflorescences

    Inflorescence racemose or paniculate, of 8 - 18 whorls, each 7 - 25-flowered, erect, leaves overlapping, non-propagating, 30 - 60 cm long, up to 15 cm wide, rachis triangular in cross-section, broadly cleft, pedicels furrowed, up to 50 cm long, c. 12 mm diam, bracts slightly fused at the base, lanceolate, longer than the stems, up to 1.5 - 3.5 cm long, approx. 12 mm in diameter, 6 mm wide, 12 - 17-veined, long pointed tip, pedicels spread out in flower and fruit, 0.1 - 1.5 cm long, approx. 0.5 mm in diameter, flowers c. 2 cm in diameter, sepals and petals spreading, sepals 10 - 13-veined, c. 5 mm long, c. 4 mm wide, veins without papillae, petals not clawed, not overlapping, c. 12 mm long, c. 10 mm wide, stamens 12, anthers many, c. 1.5 mm long, filaments c. 1.5 mm long, carpels numerous


    Echinodorus virgatus was probably described from a single collection from Tepic in the state of Nayarit, Mexico (Hooker & Arnott 1838). There are no later collections and the taxon is considered extinct (Lot et al. 1999). According to Haynes & Holm-Nielsen (1994), this taxon differs from the other species, especially from other Mexican species. The distinguishing features are translucent lines, winged rachis and round glands in the fruits (Haynes & Holm-Nielsen 1994). These features are typical of E. palaefolius, and phylogenetic analysis has identified E. virgatus as sister with few morphological differences in consecutive characters (Lehtonen & Myllys 2008).


    Flowering and fruiting from January to June. [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. "Echinodorus palaefolius [Mexican Sword-Plant] Alismataceae" by tuis is licensed under CC BY-NC-ND 2.0
    3. "Echinodorus palaefolius" by Dinesh Valke is licensed under CC BY-SA 2.0
    4. 4.0 4.1 4.2 4.3 4.4 by syasyaridzuan (licensed under