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

Polygonaceae >

Stipules ocreous, i.e. sheathing the stem Polygonaceae
consider the other alternative
Perianth segments or lobes 6, unequal
consider the other alternative
Three outer perianth segments spiny; inner ones smaller Emex