Aquarius reptilis (Lehtonen) Christenh. & Byng
Basionym : Echinodorus reptilis Lehtonen[1]
Occurrence:
Southern Paraguay, north-eastern Argentina, southern Brazil.
Ecology
Grows on sandy riverbanks at c. 100 meters altitude.
Morphology General habit
Perennial, from short rhizomes, glabrous, up to 40 cm, rhizomes up to 5 cm long, 0.5 cm diam. Leaves emersed, leaf blade lanceolate to elliptic, 3-veined, 3 - 10 cm long, 0.5 - 2 cm wide, translucent markings present as short lines and dots, apex acute, base attenuated, petioles triangular in cross section, up to 8 cm long, 6 mm diam., base with sheath up to 2 cm long
Morphology Reproductive morphology Fruits
Fruit oblanceoloid, 3 - 4-ribbed, keeled, glandular, approx. 1.5 mm long, 0.5 mm wide, glands 2, separated by ribs, round, beak end, erect, c. 0.3 mm.
Morphology Reproductive morphology Inflorescences
Inflorescence consisting of umbels or racemes, 1 - 2 (- 3) whorls, each 3 - 5-flowered, prostrate, overhanging leaves, often multiplying, 5 - 10 cm long, 4 cm wide, rachis round to triangular in cross-section , pedicels round, up to 20 cm long, 1 mm in diameter, bracts free, lanceolate, coarse with membranous margins, much shorter than the concealed pedicels, up to 8 mm long, 3 mm wide, c. 7 - 11-veined, apex pointed, pedicels in flower and fruit spreading, round, 3.5 - 6 cm long, 5 mm diam. flowers 2.5 - 4 cm diameter, sepals and petals spreading, sepals c. 11 - 14-veined, c. 5 mm long, c. 3 mm wide, veins without papillae, petals white, without claws, not overlapping, c. 12 mm long, c. 12 mm wide, stamens 15 - 22, anthers many-sided, c. 1.5 mm long, filaments c. 3 mm long, carpels numerous
Note
This species is named after the prostrate and creeping habit characteristic of this species. This species has been described as Echinodorus sp. in Lehtonen (2006) and E. sp. 1 in Lehtonen & Myllys (2008). E. reptilis is characterized by a creeping umbellate or racemose inflorescence of 2 whorls with only 3 - 4 flowers on long pedicels. The plant is also much smaller than most other species in the genus. The leaves are densely packed with short translucent lines. All known collections have been made on sandbanks of rivers, a habitat normally avoided by the genus. Phylogenetically, E. reptilis resembles E. uruguayensis (Lehtonen & Myllys 2008), and the emersed foliage of the former indeed resembles that of the latter. However, E. uruguayensis grows mainly under submersed conditions and only occasionally has emersed leaves, whereas E. reptilis grows emersed and apparently does not produce morphologically characteristic submersed foliage at all.[1]
Phenology
Flowering and fruiting from October to January.
- Translated with www.DeepL.com/Translator (free version) ***
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Aquarius reptilis (Lehtonen) Christenh. & Byng[2] -
Aquarius reptilis (Lehtonen) Christenh. & Byng[2] -
Aquarius reptilis (Lehtonen) Christenh. & Byng[2] -
Aquarius reptilis (Lehtonen) Christenh. & Byng[2]
- ↑ 1.0 1.1 POWO (2021). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Im Internet veröffentlicht; http://www.plantsoftheworldonline.org/ Abgerufen am 22. August 2021."
- ↑ 2.0 2.1 2.2 2.3 Beobachtung © Antonio Moreno Talamantes (licensed under http://creativecommons.org/licenses/by-nc/4.0/