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Polygonum pensylvanicum - L.

Common Name Pennsylvania Smartweed
Family Polygonaceae
USDA hardiness Coming soon
Known Hazards None known
Habitats Waste ground in moist soils[235]. Moist, disturbed places, ditches, riverbanks, cultivated fields, shorelines of ponds and reservoirs from sea level to 1800 metres[270]
Range Eastern N. America - Nova Scotia to Ontario, Minnesota, Florida and Texas.
Edibility Rating    (0 of 5)
Other Uses    (0 of 5)
Weed Potential Yes
Medicinal Rating    (1 of 5)
Care
Moist Soil Semi-shade Full sun
Polygonum pensylvanicum Pennsylvania Smartweed


USDA-NRCS PLANTS Database / USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
Polygonum pensylvanicum Pennsylvania Smartweed
Elaine Haug @ USDA-NRCS PLANTS Database

 

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Summary


Physical Characteristics

 icon of manicon of flower
Polygonum pensylvanicum is a ANNUAL growing to 0.7 m (2ft 4in). It is in flower from April to December. The species is hermaphrodite (has both male and female organs).
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

 Cultivated Beds;

Edible Uses

None known

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.


An infusion of the plant tops has been used in the treatment of epilepsy[257]. An infusion of the leaves has been used to treat haemorrhages of blood from the mouth and to aid postpartum healing[257]. The leaves have been used as a wipe on the anus in treating bloody piles[257].

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Other Uses

None known

Cultivation details

207058 222160

Temperature Converter

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Propagation

Seed - sow spring in situ.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Polygonum alaskanumAlaska Wild Rhubarb21
Polygonum alpinumAlpine Knotweed, Alaska wild rhubarb21
Polygonum amphibiumWillow Grass, Water knotweed, Longroot smartweed, Water smartweed12
Polygonum arenastrumSmall-Leaved Knotweed, Oval-leaf knotweed23
Polygonum aviculareKnotweed, Prostrate knotweed23
Polygonum barbatumJoint Weed11
Polygonum bistortaBistort, Meadow bistort, Snakeweed33
Polygonum bistortoidesAmerican Bistort31
Polygonum bungeanumBunge's smartweed10
Polygonum coccineumWater Smartweed10
Polygonum conspicuum 10
Polygonum convolvulusBlack Bindweed10
Polygonum divaricatum 10
Polygonum douglasiiKnotweed, Douglas' knotweed, Austin knotweed, Engelmann's knotweed, Johnston's knotweed, Large kno20
Polygonum dumetorumClimbing false buckwheat11
Polygonum equisetiforme 10
Polygonum fugax 30
Polygonum hydropiperSmartweed, Marshpepper knotweed22
Polygonum japonicumJapanese Knotweed, Mexican Bamboo, Japanese Knotweed33
Polygonum lapathifoliumCurlytop Knotweed11
Polygonum limosum 10
Polygonum longisetumOriental lady's thumb10
Polygonum maackianum 10
Polygonum manshurienseAsian Bistort01
Polygonum microcephalum 10
Polygonum minusPygmy smartweed10
Polygonum molle 21
Polygonum multiflorumHe Shou Wu, Tuber fleeceflower23
Polygonum nepalenseNepalese smartweed11
Polygonum orientalePrince's Feather, Kiss me over the garden gate22
12

 

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Expert comment

Author

L.

Botanical References

235274

Links / References

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Subject : Polygonum pensylvanicum  
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