Aponogeton stuhlmannii Engl.
  • Notizbl. Königl. Bot. Gart. Berlin


Cite taxon page as 'WFO (2020): Aponogeton stuhlmannii Engl. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000761010. Accessed on: 26 Oct 2020'

Morphology

Stamens 6; filaments 2–2.5 mm. long, lilac but whitish near the thicker base; anthers 0.5–0.6 mm. long and 0.3–0.4 mm. wide, brownish yellow, but turning black when withering.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    Ovaries 2–4, green with 2–10 ovules.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
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    Follicles green to somewhat bluish (but beak whitish at least near die tip), 2–3 mm. long, including a ± 1 mm. long curved beak, and 0.5–0.6 mm. wide.

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    Seeds elliptic, 1.5–2.5 mm. long and ± 0.5 mm. wide, with a double testa, not longitudinally ridged.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    • 13
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    Tuber globular to conical, 6–12 mm. long and 4–10 mm. in diameter, with very numerous whitish slender roots.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    • 13
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    Plants monoecious.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
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    Flowers white, often drying a bluish white, rather laxly set on unbranched somewhat unilateral spikes on slender peduncles; peduncles 5–15 cm. long and 1–1.5 mm. thick above, green but inflorescence-axis and base white; spathe 6–10 mm. long, greenish, usually early caducous.

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    • 13
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    Leaves usually 5–10 per tuber; petiole 5–20 cm. long and 0.2–0.6 mm. thick; blade narrowly oblong to lanceolate, 2–5 cm. long and 4–10 mm. wide, with 5–9 parallel lateral nerves, floating on the surface of the water; base cuneate to truncate, tip obtuse; primary leaves occasionally produced, 1–2 cm. long, linear, without blade.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    • 13
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    Tepals 2, white and shiny, but often with a lilac tinge, ligulate, 3.5–5.5 mm. long and 1–2 mm. wide, 1-nerved.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    • 13
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    Spike 1–2 cm. long and 5–10 mm. wide with tepals spreading, the flowers usually inserted on one side of the axis, but at maturity often more cylindrical, only 7–15-flowered.

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    • 13
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    A delicate, fugitive plant. Rhizome tuberous. Leaves linear, petiolate and floating, seldom subulate and submerged. Petiole up to 170 mm long. Spike simple, few-flowered. Perianth segments deciduous, small. Flowers white.

  • Provided by: [C].e-Flora of South Africa
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    Small tuberiferous herbs 3-12 cm high, with the upper parts fugaceous. Tubers developing new plants laterally, globose, up to 1 cm in diam. brown, densely covered above with long, fine, white matted roots. Leaves: the primary(representing the petioles only)submerged, awl-shaped falcate, about 2 cm long, 1 mm in diam., present in young seedlings; later leaves forming a long filiform petiole and a floating lamina, linear-oblong, 2-4 cm long and 5-6 mm broad, apex and base obtuse. Spikes simple, about 9-flowered, short at first, elongating in fruit, up to 2 cm long; spathe spotted, membranous; flowers at first dorsiventrally arranged in 2 rows, afterwards the rhachis twists in a zig-zag fashion and the arrangement then appears more cylindrical; perianth-segments 2, white, oblong, 5 mm long, deciduous, apex obtuse or emarginate. Stamens about 6, filaments narrowly subulate, 1-2 mm long, anthers yellow, turning black. Carpels c.3, whitish to purplish or bluish, transparent, with 4-6 basal ovules; style about as long as the ovary. Follicles turbinate, 1-4 seeded; seeds black, shiny, fusiform, 2 mm long.

  • Provided by: [C].e-Flora of South Africa
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    • 16
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    Habitat

    Small waterworn pools in sandstone ridges or granite.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 14
    • ]. 

    Usually found in granite rock pools that are dry most of the year. A fugaceous plant developing very fast under favourable conditions, the tuber becoming dormant again when the pool dries up.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 16
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    Distribution

    Recorded from the Transvaal and South West Africa; also in East Africa and Rhodesia.

  • Provided by: [C].e-Flora of South Africa
    • Source: [
    • 16
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     Information From

    Aponogetonaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FTEA
    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
    • B
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • C All Rights Reserved
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • E See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • F All Rights Reserved