PlantsFernsWatermoss — Genus Salvinia
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Water Spangles —  Salvinia minima [1,2]
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Kariba-weed —  Salvinia molesta [1,2]
Evidence that species is found in Texas:
  1. Atlas of the Vascular Plants of Texas, Volume 2, B.L. Turner, Holly Nichols, Geoffrey Denny and Oded Doron, Botanical Research Institute of Texas (BRIT), Fort Worth, Texas, 2003.
  2. USDA Plants Database, advanced search for Texas plants from the United States Department of Agriculture.