Aponogeton desertorum Zeyh. ex Spreng.
  • Syst. Veg.


Cite taxon page as 'WFO (2019): Aponogeton desertorum Zeyh. ex Spreng. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000760934. Accessed on: 08 Dec 2019'

Morphology

Freshwater aquatic. Rhizome tuberous. Tuber globose, 10-20 mm in diameter. Lamina oblong-lanceolate, base cordate. Scape swollen above. Flowers in long, cylindrical, tapered spikes. Spikes bifid with flowers arranged all around axis. Flowers yellow.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Rhizomatous aquatic. Leaves floating, oblong, cordate. Flowers spirally arranged and crowded, whitish, with 2 tepals, stamens usually 6.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Tubers small, globose, 1-2 cm in diam., brown. Leaves 6-9 per plant, petioles flattened, striate, lamina floating, oblong, 5-17 cm long and 2-6 cm broad, apex obtuse, apiculate, base cordate, thinly coriaceous, often with many immersed oil glands in the epidermis(no submerged leaves seen). Spike bifid, lengthening during anthesis, 3-12 cm long, scape flattened, usually swollen above. Flowers white(in eastern Cape)or yellow, eventually somewhat laxly arranged all around the rhachis, the thick fruiting carpels below and the elongated young apical part giving the spikes their typically tapered appearance; perianth-segments 2, narrow-oblong to narrow-obovate, 2 mm long. Stamens usually 6, filiform, somewhat flattened, 2 mm long, spreading, anthers small, early deciduous, pollen ellipsoid, copious. Carpels 5-3, ovoid, 2 mm long, with a terete style, with the stigmatic ridge short, apical, glutinous, usually dark; the 4-8 ovules usually visible through the transparent walls of the carpels and follicles; seeds cylindrical, 2 mm long, mostly about 6 ripening in each follicle.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Habitat

    Fresh water, rock pools or temporary river pools.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Rock pools.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Found in rock pools or temporary river pools, developing extremely fast under favourable conditions.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Distribution

    Uitenhage to Botswana and Namibia.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Recorded from the eastern Cape, Transvaal, Bechuanaland and South West Africa; also in Angola and Rhodesia. The flowers were noted as white in the eastern Cape, but are yellow further north.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

      Bibliography

    • 1 Herman, PPJ; Retief, E. 1997. Plants of thenorthern provinces of South Africa: keys and diagnostic characters. Strelitzia 6: 1 - 681. National Botanical Institute, Pretoria.
    • 2 Manning, JC; Goldblatt, P. 2012. Aponogetonaceae. 62 - 63. South African National Biodiversity Institute, Pretoria.
    • 3 Obermeyer, AA. 1966. Order: Helobiae. Fl. S. Africa 1: 56 - 112. BRI & Nat. Bot. Gdns, Pretoria & Cape Town.
    • 4 Syst. Veg.

     Information From

    Aponogetonaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B All Rights Reserved
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C 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.
    • D 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
    • E All Rights Reserved