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Reproduction: Primarily a self-pollinating plant (supported by its inconspicuous, closed flowers and lack of a detectable scent), with occasional outcrossing. Fruits and viable seeds are produced without assistance from pollinators.

What Is Mile-a-minute Weed - (Persicaria perfoliata)?

Habitat: Terrestrial. Prefers wet areas.
Distribution in Ireland: Sparse distribution but locally abundant in some places.

Status: Established
Family name: Polygonaceae

Mile-a-minute Weed - Persicaria perfoliata BiodiversityRisk High
Mile-a-minute Weed Infestation
Mile-a-minute Weed Fruit

Mile-a-minute weed infestation

Mile-a-minute Weed is a species of flowering plant in the buckwheat family. Common names include mile-a-minute weed, devil's tail, giant climbing tearthumb, and Asiatic tearthumb. It is a trailing herbaceous annual vine with barbed stems and triangular leaves. It is native to most of temperate and tropical eastern Asia, from eastern Russia in the north down to the Philippines and India in the south.

Mile-a-minute Weed leaves & fruit invasive species management & control

How To Identify Mile-a-minute Weed?

Colour: Reddish stem that is armed with downward pointing hooks or barbs which are also present on the underside of the leaf blades.  

Mile-a-minute Weed leaf invasive species management & control

Leaf: The light green leaves are shaped like an equilateral (equal-sided) triangle and alternate along the narrow, delicate stems.  

Mile-a-minute Weed seed invasive species management & control
Mile-a-minute Weed Infestation - Alien Invasive weed management & control

Mile-a-minute weed - Persicaria perfoliate ID Guide

Mile-a-minute weed leaves

Mile-a-minute weed seed

Leaf

Why Is Mile-a-minute Weed A Problem?

Forms dense mats that crowd out native species. It is a vigorous, barbed, vine that smothers other herbaceous plants, shrubs and even trees by growing over them.

 

Growing up to 16 cm per day, mile-a-minute weed forms dense mats that cover other plants and then stresses and weakens themthrough smothering and physically damaging them.

 

Sunlight is blocked, thus decreasing the covered plant’s ability to photosynthesize; and the weight and pressure of the mile-a-minute weed can cause poor growth of branches and foliage. The smothering can eventually kill overtopped plants.

Mile-a-minute Weed - Invasive Weed Information

European Communities (Birds and Natural Habitats) Regulations 2011 non-native invasive plant species A-Z (Updated 2017)

There are currently 35 invasive plant species listed in the European Communities (Birds and Natural Habitats) Regulations (annex 2, Part 1)...

 

Click on a species from the following list to find out more regarding non-native species subject to restrictions under Regulations 49 and 50.

  1. American Skunk-CabbageLysichiton americanus

  2. Brazilian Giant-RhubarbGunnera manicata

  3. Broad-Leaved RushJuncus planifolius

  4. Cape PondweedAponogeton distachyos

  5. Cord-GrassesSpartina (all species and hybrids)

  6. Curly Waterweed - Lagarosiphon major

  7. Dwarf Eel-GrassZostera japonica

  8. FanwortCabomba caroliniana

  9. Floating PennywortHydrocotyle ranunculoides

  10. Fringed Water-LilyNymphoides peltata

  11. Giant HogweedHeracleum mantegazzianum

  12. Giant KnotweedFallopia sachalinensis

  13. Giant-RhubarbGunnera tinctoria

  14. Giant SalviniaSalvinia molesta

  15. Himalayan BalsamImpatiens glandulifera

  16. Himalayan KnotweedPersicaria wallichii

  17. Hottentot-FigCarpobrotus edulis

  18. Japanese KnotweedFallopia japonica

  19. Large-Flowered WaterweedEgeria densa

  20. Mile-a-Minute WeedPersicaria perfoliata

  21. New Zealand PigmyweedCrassula helmsii

  22. Parrots FeatherMyriophyllum aquaticum

  23. Red AlgaGrateloupia doryphora

  24. RhododendronRhododendron ponticum

  25. SalmonberryRubus spectabilis

  26. Sea-Buckthorn Hippophae rhamnoides

  27. Spanish Bluebell Hyacinthoides hispanica

  28. Three-Cornered LeekAllium triquetrum

  29. WakameUndaria pinnatifida

  30. Water ChestnutTrapa natans

  31. Water FernAzolla filiculoides

  32. Water LettucePistia stratiotes

  33. Water-PrimroseLudwigia (all species)

  34. WaterweedsElodea (all species)

  35. WireweedSargassum muticum