Echinodorus eglandulosus Holm-Niels.

  • Authority

    Haynes, Robert R. & Holm-Nielsen, Laurtiz B. 1994. The Alismataceae. Fl. Neotrop. Monogr. 64: 1-228. (Published by NYBG Press)

  • Family

    Alismataceae

  • Scientific Name

    Echinodorus eglandulosus Holm-Niels.

  • Type

    Type. ECUADOR. Napo: Río Yasuní, Jatuncocha, 75° 28 W, 1° 00 S, 280 m elev., lake, lakeshore, and swamp in blackwater area, on temporarily dry shore, 27 Aug 1979, Holm-Nielsen, Jaramillo & Coello 19996 (holotype, AAU!; isotypes, K!, NY!, UNA!).

  • Description

    Species Description - Annual or short-lived perennials from short, erect rhizomes, glabrous, to 60 cm tall; rhizomes to 1 cm long, to 1 cm diam. Leaves emersed, greenish-brown; blade lanceolate to oval, entire, with 3-5 veins, 2-12 cm long, 1-4 cm wide, the pellucid markings evident as separate lines, the apex acute, the base attenuate; petiole triangular in cross section, winged, twice as long as blade, 5-20 cm long, 0.05-0.1 mm diam., the base with a sheath to 2 cm long. Inflorescence racemose, up to 8 whorls, erect to decumbent, overtopping the leaves, often vegetatively proliferating, 30-60 cm long, to 1.5 cm wide, the whorls with 3-6 flowers, the rachis triangular between whorls; peduncle terete, 10-15 cm long, ca. 0.1 mm wide; bracts lanceolate, delicate, about equal to pedicel, to 10 mm long, 0.1-0.2 mm wide, the apex acuminate to subulate; pedicels spreading in flower, recurved in fruit, cylindric, to 10 mm long, ca. 0.5 mm diam. Flowers ca. 1 cm wide; sepals spreading to reflexed, 7-8-veined, ca. 3 mm long, 2-3 mm wide, the veins without papillae; petals without claws, ca. 4 mm long, ca. 3 mm wide; stamens 12, the anthers versatile, to 1.5 mm long, the apex obtuse, the filaments to 1.5 mm wide, the carpels numerous. Fruit broad-clavate, 6-8 ribbed, keeled, eglandular, separating when mature, ca. 1.7 mm long, ca. 0.5 mm wide, the beak terminal, erect, to 0.3 mm long.

  • Objects

    Specimen - 311445, L. B. Holm-Nielsen 19996, Echinodorus eglandulosus Holm-Niels., Alismataceae (30.0), Magnoliophyta, isotype; South America, Ecuador, Napo

  • Distribution

    Known only from the Río Yasuní area of eastern Ecuador. Flowers and fruits in August to September; 200-300 m elev. This species is not known to be cultivated.

    Ecuador South America| Napo Ecuador South America|