5474.000 Ammannia L.

Description of the genus

Annual, glabrous herbs. Stems erect or decumbent, 4-gonous or 4-winged, simple or ± branched. Leaves decussate, sessile, entire, 1-nerved; bracteoles small, membranous, whitish. Flowers 4 (5–8)-merous, never heterostylous. Calyx campanulate or urn-shaped, 8-ribbed; appendages absent or very short. Petals 4–8, very caducous or absent, small, obovate, spathulate or rounded. Stamens as many as or twice the number of calyx-lobes, rarely fewer, with the filaments inserted at 1/4–1/2 of the calyx-tube length; anthers didymous. Ovary incompletely 2–4(5)-locular, sometimes unilocular; stigma capitate; ovules numerous, axile or on the septa. Fruit capsule globose or ellipsoid, included in the calyx or ± exserted, thinly membranous, dehiscing transversally and irregularly; seeds numerous, very small, angular.

Worldwide: Species 20, cosmopolitan.

Caprivi: 1 taxon.

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Links to taxa:     View: living plant images - herbarium specimen images - all images for this genus

SpeciesContent
auriculata Willd.Description, Image

Other sources of information about Ammannia:

Our websites:

Flora of Botswana: Ammannia
Flora of Caprivi: cultivated Ammannia
Flora of Malawi: Ammannia
Flora of Mozambique: Ammannia
Flora of Zambia: Ammannia
Flora of Zimbabwe: Ammannia

External websites:

African Plants: A Photo Guide (Senckenberg): Ammannia
BHL (Biodiversity Heritage Library): Ammannia
EOL (Encyclopedia of Life): Ammannia
GBIF (Global Biodiversity Information Facility): Ammannia
Google: Web - Images - Scholar
iNaturalist: Ammannia
IPNI (International Plant Names Index): Ammannia
JSTOR Plant Science: Ammannia
Mansfeld World Database of Agricultural and Horticultural Crops: Ammannia
Plants of the World Online: Ammannia
Tropicos: Ammannia
Wikipedia: Ammannia

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2014-24

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2024). Flora of Caprivi: Genus page: Ammannia.
https://www.capriviflora.com/speciesdata/genus.php?genus_id=1003, retrieved 19 April 2024

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