Home/Species/ Wiry Knotweed

Polygonum majus

(Meisner) Piper

Wiry Knotweed

G5Secure Found in 1 roadless area NatureServe Explorer →

G5SecureGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.134567

Element CodePDPGN0L0X4

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicoccurs (regularly, as a native taxon) in multiple nations

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPolygonales

FamilyPolygonaceae

GenusPolygonum

Synonyms

Polygonum douglasii ssp. majus(Meisn.) Hickman

Other Common Names

Grand renouée (FR)

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Taxonomic Comments

FNA (vol. 5, 2005) elevates Polygonum douglasii ssp. majus to full species as P. majus.

Conservation Status

Rank MethodExpertise without calculation

Review Date2017-12-14

Change Date2017-12-14

Ecology & Habitat

Other Nations (2)

CanadaN5

Province	Rank	Native
British Columbia	S5	Yes

United StatesNNR

Province	Rank	Native
Montana	SNR	Yes
Nevada	S1	Yes
Utah	SNR	Yes
Idaho	SNR	Yes
Oregon	SNR	Yes
Washington	SNR	Yes
Wyoming	SNR	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (1)

Washington (1)

Area	Forest	Acres
Wenatchee Creek	Umatilla National Forest	15,315

References (2)

Flora of North America Editorial Committee (FNA). 2005. Flora of North America north of Mexico. Vol. 5. Magnoliophyta: Caryophyllidae: Caryophyllales, Polygonales, and Plumbaginales. Oxford Univ. Press, New York. vii + 656 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.