Salvinia molesta D.S.Mitch.

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Salvinia molesta

Photo: Petra Ballings
SRGH

Salvinia molesta

Photo: Petra Ballings
SRGH

Salvinia molesta

Photo: Petra Ballings
Zambezi National Park

Salvinia molesta

Photo: Petra Ballings
Zambezi National Park

Salvinia molesta

Photo: Petra Ballings
Zambezi National Park

Salvinia molesta

Photo: Petra Ballings
Zambezi National Park

Salvinia molesta

Photo: Bart Wursten
Zambezi National Park

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

Synonyms: Salvinia auriculata sensu Schelpe, non Aubl.
Salvinia natans sensu Cadet, non (L.) All.
Common names:
Frequency:
Status: Introduced
Description:
Plants free-floating aquatics. Rhizome up to 1.2 mm in diameter, horizontal, repeatedly dichotomously branched, with brown hairs. Leaves in whorls of three, two unwettable floating leaves and a submerged leaf at each node. Floating leaves broadly obovate, rounded to emarginate at the apex, cordate at the base, folded along the midrib in vigorous plants; upper surface covered with parallel rows of multicellular stalked hairs each subtended by 3-4 arms which re-unite at the apex in a cagelike structure, lower surface only simple hairs near the midrib. Submerged leaf finely dissected, rootlike, up to 12 cm long, set with brown hairs. Sporocarps in 2 rows along one lobe of the submerged leaf, ovoid, c. 2-3 mm in diameter, resembling a string of beads, heterosporous.
Notes:
Derivation of specific name: molesta: annoying, troublesome; a reference to the difficulties in eradicating the spreading nature of this plant in aquatic habits such as Lake Kariba along the Zambezi River. The popular name is, therefore, 'Kariba Weed'.
Habitat: In mud and backwaters of lakes, dams and rivers, often forming extensive free-floating mats.
Altitude range: (metres)
Worldwide distribution: Introduced from tropical America to southern, central and east Africa; also naturalised on Mauritius & Rodrigues Island, India, Sri Lanka, Australia and possibly Malaysia, Indonesia and New Zealand.
Zimbabwe distribution: N,W,C,E
Growth form(s): Aquatic.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Literature:

Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 80 - 81. (Includes a picture).

Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 218 - 219. (Includes a picture).

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 490 - 491. (Includes a picture).

Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Page 122.

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 10.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 178.

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 59.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 67. As Azolla auriculata (Includes a picture).

Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 16.

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 179.


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Flora of Botswana: Salvinia molesta
Flora of Caprivi: Salvinia molesta
Flora of Mozambique: Salvinia molesta
Flora of Zambia: Salvinia molesta

External websites:

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


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: Salvinia molesta.
http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=102890, retrieved 28 May 2016

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