Persicaria decipiens
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Persicaria
Species:
P. decipiens
Binomial name
Persicaria decipiens
Synonyms[1]
List
    • Persicaria minor subsp. decipiens (R.Br.) Soják
    • Persicaria salicifolia (Brouss. ex Willd.) Assenov
    • Persicaria salicifolia subsp. mambillensis Ayodele
    • Persicaria serrulata (Lag.) Webb & Moq.
    • Persicaria serrulata var. asiatica Nakai
    • Polygonum abyssinicum A.Rich.
    • Polygonum acre Meisn.
    • Polygonum adoense Gand.
    • Polygonum azoricum H.C.Watson ex Meisn.
    • Polygonum decipiens R.Br.
    • Polygonum divaricatum Poir.
    • Polygonum erythropus Dammer
    • Polygonum flaccidum Roxb.
    • Polygonum glabrum Roxb.
    • Polygonum glabrum Roxb. ex D.Don
    • Polygonum leuconeuron Peter
    • Polygonum macrochaetum Miq.
    • Polygonum minus Ten.
    • Polygonum minus subsp. decipiens (R.Br.) Danser
    • Polygonum rapte Ham. ex Hook.f.
    • Polygonum rubicundum Sol. ex Meisn.
    • Polygonum salicifolium Brouss. ex Willd.
    • Polygonum scabrum Poir.
    • Polygonum serrulatoides H.Lindb.
    • Polygonum serrulatum Lag.
    • Polygonum sinuatum R.Br.
    • Polygonum strictum Meisn.

Persicaria decipiens, commonly known as slender knotweed, is a species of flowering plant native to Australia and Asia.[2]

Persicaria decipiens is a trailing plant whose stems grow horizontally at first but become more vertical with time,[3] reaching 30 cm (1 ft) high. Its narrow elliptic to lanceolate (spear-shaped) leaves are 5–12 cm (2–4.5 in) long and 0.5–1.3 cm (0.20–0.51 in) across.[2] The slender pink flower spikes appear from November to June, with a peak in February.[3] Cylindrical in shape, they are not stiff and tend to bend over.[2] The plant tends to die back in winter and regenerate after water.[3]

Persicaria decipiens was among the plants collected by Joseph Banks and Daniel Solander on 5 May 1770 at Botany Bay during the first voyage of Captain James Cook.[4] Prolific Scottish botanist Robert Brown described the species as Polygonum decipiens in his 1810 work Prodromus Florae Novae Hollandiae et Insulae Van Diemen.[5] It was given its current name by Karen Wilson in 1988 as the broadly defined genus Polygonum was split into smaller genera.[4] Common names include slender knotweed, willow weed and snake root.[6]

Flowerhead

P. decipiens is found in water and wet soil. It is found across Africa and the Mediterranean,[6] through southwestern Asia, Malesia and all states of Australia, as well as Norfolk Island, New Zealand and New Caledonia.[2] It has become naturalised in Madagascar.[6]

Likely pollinators of its flowers are insects, including honeybees, native bees, flies, wasps and small butterflies.[3]

Persicaria decipiens is not cultivated but is eaten locally in times of famine in Africa.[6]

References

  1. ↑ "Persicaria decipiens (R.Br.) K.L.Wilson". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 23 December 2020.
  2. 1 2 3 4 Wilson, K.L. "New South Wales Flora Online: Persicaria decipiens". Royal Botanic Gardens & Domain Trust, Sydney, Australia.
  3. 1 2 3 4 Benson, Doug; McDougall, Lyn (1999). "Ecology of Sydney Plant Species Part 7a: Dicotyledon families Nyctaginaceae to Primulaceae" (PDF). Cunninghamia. 6 (2): 402–508 [484]. Archived from the original (PDF) on 2016-03-13.
  4. 1 2 Wilson, Karen L. (1988). "Polygonum sensu lato (Polygonaceae) in Australia". Telopea. 3 (2): 177–82. doi:10.7751/telopea19884806.
  5. ↑ Brown, Robert (1810). Prodromus Florae Novae Hollandiae et Insulae Van Diemen (in Latin). London, United Kingdom: Richard Taylor and Company. p. 420.
  6. 1 2 3 4 Grubben, G. J. H. (2004). Vegetables. Plant Resources of Tropical Africa. Vol. 2. PROTA. pp. 413–14. ISBN 9789057821479.
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