653B-2-Persicaria-praetermissa-fl-1-Marilyn-Gray.jpg

Persicaria praetermissa

Spotted Knotweed

Scrambling to clumping perennial herb with short stiff downward facing hairs. Sheath at base of leaf has scattered short hairs, top margins hairless.

Additional information

  • SynonymSeparated from Polygonum strigosum
  • FamilyPolygonaceae
  • StoreyLower storey
  • SizeStems to 1 m+ long
  • Plant groupingAquatic & Semi aquatic
  • LeavesArrow-shaped leaves 3-20 cm x 6-18 mm, with short coarse hairs on margins, midribs and scattered on leaf.
  • Flower colourPink or white
  • Flowering timeDecember to April
  • FlowersNarrow cylindric spike 5-9 cm long, forked halfway along spike, flowers in 2-5 clusters spaced along the spike.
  • Bird attractingLeaves, seeds
  • Butterfly attractingNo
  • Frog habitatYes
  • Growing conditionsAquatic to semi-aquatic in swampy areas and edges of slow-moving rivers in lowlands and foothills.
  • Garden useWet areas and bog gardens creating animal and waterbird habitat and protection.
  • Commercially availableIndigenous nursery
  • Conservation statusLocally common within its preferred growing conditions
Photographer/s: 1, 5 Peter Kinchington ©; 2-4 Marilyn Bull ©

Plant Communities

  • 11 Manna Gum Riparian Forest - Central Highlands (EVC 18)
  • 35 Floodplain Wetland Complex (EVC 172)
  • 30 Swamp Gum Swampy Riparian Woodland (EVC 83)
  • 39 Sedge Wetland Complex (EVC 136)
  • 33 Mountain Swamp Gum Swampy Riparian Woodland (EVC 83)
  • 41 Swamp Paperbark Riparian Thicket (EVC 59)
  • 34 Manna Gum Floodplain Riparian Woodland (EVC 56)
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