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Najas horrida
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Photo: Helen Pickering
On the southern side of Bovu Island, Zambezi River
Photo: Helen Pickering
On the southern side of Bovu Island, Zambezi River
Photo: Mike Kennedy
Zambezi (FEOW: Middle Zambezi - Luangwa)
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Species details: Click on each item to see an explanation of that item (Note: opens a new window)
| Synonyms: |
Najas interrupta K. Schum. 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: |
Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 128. 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. Triest, L. (1987). A revision of the genus Najas L. (Najadaceae) in Africa and surrounding islandss Klasse voor Natuur- en Geneeskundige Wetenschappen Boek 21-4 Koninklijke Academie voor Overzeese Wetenschappen, Brussel Pages 44 - 52. (Includes a picture). |
Other sources of information about Najas horrida:
Our websites:
Flora of Botswana: Najas horridaFlora of Caprivi: Najas horrida
Flora of Malawi: Najas horrida
Flora of Mozambique: Najas horrida
Flora of Zambia: Najas horrida
External websites:
African Plants: A Photo Guide (Senckenberg): Najas horridaBHL (Biodiversity Heritage Library): Najas horrida
EOL (Encyclopedia of Life): Najas horrida
GBIF (Global Biodiversity Information Facility): Najas horrida
Google: Web - Images - Scholar
iNaturalist: Najas horrida
IPNI (International Plant Names Index): Najas horrida
JSTOR Plant Science: Najas horrida
Mansfeld World Database of Agricultural and Horticultural Crops: Najas horrida
Plants of the World Online: Najas horrida
Tropicos: Najas horrida
Wikipedia: Najas horrida
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