dcsimg

Description

provided by Flora of Zimbabwe
Free-floating aquatic plants. Rhizome slender, branched, roots absent or simple, borne singly or in fascicles. Leaves either dimorphic, borne in whorls of three (Salvinia) or alternate in 2 rows ( Azolla); veins free or anastomosing. Sporangia in thin-walled sporocarps on submerged leaves or in axils of submerged lobes; heterosporous.
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Mark Hyde, Bart Wursten and Petra Ballings
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Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Salviniaceae Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/family.php?family_id=202
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Mark Hyde
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Bart Wursten
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Petra Ballings
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Flora of Zimbabwe

Salviniaceae

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Salviniaceae (or formerly Salviniaceæ) is a family of heterosporous ferns in the order Salviniales.[1] The Salviniaceae contain the two genera Azolla and Salvinia,[2] with about 20 known species in total.[3] Azolla was previously placed in its own family, Azollaceae, but research has shown Azolla and Salvinia to be sister genera with the likely phylogenic relationship shown in the following diagram.[4]

Salviniales Marsileaceae    

Marsilea

       

Pilularia

   

Regnellidium

      Salviniaceae    

Azolla

   

Salvinia

       

References

  1. ^ Alan R. Smith; Kathleen M. Pryer; Eric Schuettpelz; Petra Korall; Harald Schneider & Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. doi:10.2307/25065646. JSTOR 25065646.
  2. ^ Maarten J. M. Christenhusz; Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. doi:10.11646/phytotaxa.19.1.2.
  3. ^ Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. Magnolia Press. 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1.
  4. ^ Nathalie S. Nagalingum; Michael D. Nowak & Kathleen M. Pryer (2008). "Assessing phylogenetic relationships in extant heterosporous ferns (Salviniales), with a focus on Pilularia and Salvinia" (PDF). Botanical Journal of the Linnean Society. 157 (4): 673–685. doi:10.1111/j.1095-8339.2008.00806.x.
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