e-Key v3 - Ke<span id="jodit_selection_marker_1706530753592_8209808102172287" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>y to Polygon<span id="jodit_selection_marker_1706530753592_9287657386937944" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>aceae Genera
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.
Backtrack a
  • Outer perianth segments bearing short sharp spines
 002
b
  • Outer perianth segments without spines
 002
Backtrack a
    • Spines forming at the tip of the outer perianth segments
    • Flowers unisexual
    • Female flowers sessile in axillary clusters
 Emex
b
  • Spines forming at base of the outer perianth segments
  • Flowers bisexual, in fascicles forming a lax raceme
 Oxygonum
Backtrack a
  • Perianth segments usually 6, inner 3 segments accrescent with entire, dentate or wavy margins
 Rumex
b
  • Perianth segments 4 or 5, not accrescent
 002
Backtrack a
  • Soft annual herbs with hollow stems
  • Nut at least twice as long as the perianth
 *Fagopyrum
b
  • Coarse herbs, climbers or rhizomatous perennials
  • Nut included in the perianth or protruding for less than half its length
 002
Backtrack a
  • Perianth constricted above ovary and persistent at apex of fruit
  • Heterostylous
 Oxygonum
b
  • Perianth not constricted above ovary, enclosing fruit
  • Not heterostylous
 002
Backtrack a
  • Outer perianth segments not winged or keeled in fruit
  • Leaves distinctly longer than wide, rarely cordate
 002
b
  • Outer perianth segments winged or keeled in fruit
  • Leaves conspicuously cordate
 002
Backtrack a
  • Ocrea silvery hyaline, lacerating
 Polygonum
b
  • Ocrea brown, membranous, truncate, fringed with cilia or bristles or entire
 Persicaria
Backtrack a
  • Twining annuals
  • Stigmas capitate, subsessile
 *Fallopia
b
  • Erect, rhizomatous perennials
  • Stigmas fimbriate, styles fairly long
 *Reynoutria

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