Najas horrida Magn.

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Najas horrida

Photo: Helen Pickering
On the southern side of Bovu Island, Zambezi River

Najas horrida

Photo: Helen Pickering
On the southern side of Bovu Island, Zambezi River

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

Synonyms: Najas pectinata sensu T. Durand & Schinz
Common names: Saw-weed (English)
Frequency:
Status: Native
Description:
Submerged aquatic herb, 0.3-1 m high, forming dense clumps, sometimes with the upper leaftips just above the water. Stems much-branched. Leaves spreading to falcate, 3-29 mm long, sheathing at the base; margins with broadly triangular teeth, each tooth ending in a dark brown spine. Flowers unisexual on the same plant, inconspicuous, solitary, almost hidden in the sheathed axils of the leaves; male flower enclosed in a spathe, 1.3-3.5 mm long; female flower naked, c. 1.5-4 mm long. Fruit ellipsoid-oblong.
Notes:
Derivation of specific name:
Habitat: Lakes, dams, lagoons, ponds, pans and rivers.
Altitude range: (metres) Up to 1600 m
Flowering time:
Worldwide distribution: Widespread in Africa and Madagascar
Zimbabwe distribution: N,W,C,E,S
Growth form(s): Aquatic.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Literature:

Henderson, L. & Cilliers, C.J. (2002). Invasive Aquatic Plants Plant Protection Research Institute Handbook No. 16. Plant Protection Research Institute, Agricultural Research Council, South Africa. Pages 60 - 61. (Includes a picture).

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 93.

Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 126.

Symoens, J.J. & Triest, L. (2009). Najadaceae Flora Zambesiaca 12(2) Pages 60 - 63. (Includes a picture).

Timberlake, J.R. & Childes, S.L. (2004). Biodiversity of the Four Corners Area: Technical Reviews Volume Two (Chapter 5-15) Appendix 5-1: Plant Checklist Occasional Publications in Biodiversity 15 Page 185.


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Other sources of information about Najas horrida:

Our websites:

Flora of Botswana: Najas horrida
Flora of Caprivi: Najas horrida
Flora of Malawi: Najas horrida
Flora of Mozambique: Najas horrida
Flora of Zambia: Najas horrida

External websites:

Biodiversity Explorer (Biodiversity of southern Africa): Najas horrida
EOL (Encyclopedia of Life): Najas horrida
ePIC (electronic Plant Information Center): Najas horrida
Flora Zambesiaca web site: Najas horrida
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Najas horrida
IPNI (International Plant Names Index): Najas horrida
Ispot Southern Africa : Najas horrida
JSTOR Plant Science: Najas horrida
Kew Herbarium catalogue: Najas horrida
Kew Monocotyledon checklist: Najas horrida
Tropicos: Najas horrida
West African Plants database: Najas horrida


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-16

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2016). Flora of Zimbabwe: Species information: Najas horrida.
http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=103130, retrieved 27 July 2016

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