Oxygonum annuum S.Ortiz & Paiva
  • Bot. J. Linn. Soc.


Cite taxon page as 'WFO (2020): Oxygonum annuum S.Ortiz & Paiva. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000386984. Accessed on: 13 Jul 2020'

Morphology

An erect annual herb.

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    Male flowers not seen.

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    Hermaphrodite flowers homostylous or not conspicuously heterostylous; perianth 5-lobed; tube 0.5–1 mm long, pubescent; lobes 1–2(2.5) mm long, white, tinged with pink at the abaxial surface, sometimes pubescent.

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    Filaments 0.5–1.5 mm long; anthers 0.5–0.7 mm long.

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    Ovary c. 1 mm long; styles c. 1.5 mm long.

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    Leaves greenish, (8)20–30(60) × 0.3–0.7(1) mm, narrowly linear, glabrous or with simple white hairs.

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    Nut 4–5 × 2.3–2.5 mm, ellipsoid, with c. 12 longitudinal ridges and numerous transverse wrinkles, glabrous or pubescent.

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    Stems branching at the base and laxly above, angular-striate, greenish, reddish at the base, with simple white hairs at the base and to a varying extent above.

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    Flowers pedicellate, 3(4) in the axils of bracts, 1(2) flowering at a time, arranged in terminal spiciform, slender racemes up to 21 cm long; bracts up to 5 mm long, truncate, sometimes with a acuminate apex up to 1 mm long, glabrous to pubescent, with short apical cilia; pedicels erect, up to 5 mm long, filiform.

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    Ocrea (4)5–6(9) mm long, often 3–4 dentate at the apex, surface glabrous or somewhat pubescent, apex glabrous or with a fringe of c. 0.2 mm long hairs.

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     Information From

    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • A
    Polygonaceae
    World Flora Online Data. 2017.
    • B CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).