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Keys
  • Vascular plant groups
  • Club mosses
  • Ferns
  • Vegetative key to families
  • Gymnosperms
  • Flowering plants
  • Genera
  • Families

Potamogetonaceae

Perianth segments 4 Potamogetonaceae
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Inflorescence always 2-flowered. Carpels 2–19. Mature fruit usually stalked Ruppia
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Inflorescence usually more than 2-flowered. Carpels 4. Mature fruit ± sessile Potamogeton