Amaranthus retroflexus L.

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Amaranthus retroflexus

Photo: Bart Wursten
Zusterkloosterbossen, Kermt, Belgium

Amaranthus retroflexus

Photo: Bart Wursten
Zusterkloosterbossen, Kermt, Belgium

Amaranthus retroflexus

Photo: Bart Wursten
Zusterkloosterbossen, Kermt, Belgium

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Species details: Click on each item to see an explanation of that item (Note: opens a new window)

Synonyms:
Common names:
Frequency: Very rare in Zimbabwe
Status: Introduced
Description:
Erect or spreading annual herb, up to c 80 cm high, with a densely hairy, stout, subterete to angled stem. Leaves ovate to rhomboid or oblong-ovate, 5–11 cm long, hairy along the veins beneat and often the lower margins; petiole up to c. 6 cm long, sometimes as long as leaf-blade. Flowers in stout, axillary and terminal spikes, usually shortly branched to give a lobed appearance, greenish or rarely somewhat pink-suffused, male and female flowers intermixed, the latter generally much more plentiful. Bracts and bracteoles lanceolate-subulate, pale-membranous with a prominent green midrib. Perianth segments 5. Capsule subglobose, c. 2 mm long, usually shorter than the perianth.
Notes: Only known from this single record in Zimbabwe.
Derivation of specific name:
Habitat: A weed on irrigated land.
Altitude range: (metres)
Flowering time:
Worldwide distribution: Native in North America and Mexico, introduced into the Old world as a weed, but mostly in more temperate regions of Europe, Mediterranean region, North Africa and temperate Asia. Also in South Africa, Australia and northern South America.
Zimbabwe distribution: E
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Images last updated: Monday 30 March 2020
Literature:

Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 16.

Townsend, C.C. (1988). Amaranthaceae Flora Zambesiaca 9(1) Pages 46 - 47.


Other sources of information about Amaranthus retroflexus:

Our websites:

Flora of Zambia: Amaranthus retroflexus

External websites:

African Plants: A Photo Guide (Senckenberg): Amaranthus retroflexus
African Plant Database: Amaranthus retroflexus
BHL (Biodiversity Heritage Library): Amaranthus retroflexus
EOL (Encyclopedia of Life): Amaranthus retroflexus
ePIC (electronic Plant Information Center): Amaranthus retroflexus
Flora Zambesiaca web site: Amaranthus retroflexus
GBIF (Global Biodiversity Information Facility): Amaranthus retroflexus
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network): Amaranthus retroflexus
iNaturalist: Amaranthus retroflexus
IPNI (International Plant Names Index): Amaranthus retroflexus
JSTOR Plant Science: Amaranthus retroflexus
Kew Herbarium catalogue: Amaranthus retroflexus
Mansfeld World Database of Agricultural and Horticultural Crops: Amaranthus retroflexus
Plants of the World Online: Amaranthus retroflexus
The Plant List (version 1.1): Amaranthus retroflexus
Tropicos: Amaranthus retroflexus
Wikipedia: Amaranthus retroflexus


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-20

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2020). Flora of Zimbabwe: Species information: Amaranthus retroflexus.
https://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=122200, retrieved 1 June 2020

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