Aquarius decumbens (Kasselm.) Christenh. & Byng

Aquarius decumbens (Kasselm.) Christenh. & Byng

DE

Basionym: Echinodorus decumbens Kasselm

Morphology General habit

Perennial, from rhizomes, glabrous, up to 100 (- 200) cm, rhizomes 1 cm diam. Leaves emersed, leaf blade narrowly elliptic, 3 - 5-veined, 15 - 30 cm long, 1.8 - 4.5 cm wide, the translucent markings present as short lines, apex acute, base attenuated, petioles canalized, corrugated, up to 30 (- 45) cm long, 5 mm diam., base with sheath up to 10 cm long

Morphology Reproductive morphology Fruits

Fruit obovate-lanceolate, 4-ribbed, glandular, 2 - 3 mm long, 1.2 mm wide, glands 1, circular, separated by ribs, beak end, erect, 0.9 mm.

Morphology Reproductive morphology Inflorescences

Inflorescence racemose or rarely paniculate, of 5 - 10 whorls, each 3 - 7-flowered, prostrate, protruding leaves, spreading, up to 55 cm long, 3 cm wide, spindles triangular in cross-section, pedicels furrowed, up to 50 cm long, 3 mm wide, bracts slightly fused at the base, lanceolate, subtended longer than the pedicels, up to 5 cm long, 0.5 cm wide, approx. 12-veined, long pointed tip, pedicels spread out in flower and fruit, 0.5 - 1 cm long, flowers approx. 3 mm diam. c. 2 cm diam, sepals and petals spreading, sepals c. 15-veined, c. 5 mm long, c. 4 mm wide, veins without papillae, petals not split, not overlapping, 10 mm long, c. 10 mm wide, stamens 12, anthers many-sided, c. 1.5 mm long, filaments c. 2 mm long, carpels numerous

Type

Brazil, Piauhy, Rio Surubim, 1 April 1994, Kasselmann 205 (holotype INPA [photograph in AAU!]; isotypes B [digital image!], M!).

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.

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  Echinodorus decumbens Kasselm.