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Polygonum aviculare

Yard Knotweed

G5Secure Found in 32 roadless areas NatureServe Explorer →

G5SecureGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.785601

Element CodePDPGN0L370

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

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

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPolygonales

FamilyPolygonaceae

GenusPolygonum

Other Common Names

Prostrate Knotweed (EN) Renouée des oiseaux (FR)

Concept Reference

Costea, M. and F. J. Tardif. 2003. Nomenclatural changes in the genus Polygonum section Polygonum (Polygonaceae). Sida 20(3):987-997.

Taxonomic Comments

This record represents the broad concept of Polygonum aviculare following FNA (vol. 5, 2005) that includes taxa that Kartesz (1994, 1999) treats as distinct species. This treatment used by Costea and Tardif (2003) and FNA (vol. 5, 2005) recognizes the following subspecies in P. aviculare: P. aviculare ssp. aviculare (= P. aviculare), P. aviculare ssp. boreale (= P. boreale), P. aviculare ssp. buxiforme (= P. buxiforme), P. aviculare ssp. depressum (=P. arenastrum), P. aviculare ssp. neglectum, and P. aviculare ssp. rurivagum. In contrast, Kartesz (1994, 1999) recognize P. aviculare, P. arenastrum, P. bellardii, P. boreale, P. buxiforme, and P. franktonii.

Conservation Status

Rank MethodExpertise without calculation

Review Date2016-08-27

Change Date2016-08-27

Ecology & Habitat

Other Nations (2)

CanadaN5

Province	Rank	Native
Nunavut	SU	Yes
British Columbia	SNA	No
Alberta	SU	Yes
Manitoba	SU	Yes
Island of Newfoundland	SNA	No
Saskatchewan	SNR	Yes
Nova Scotia	S5	Yes
New Brunswick	SNA	No
Ontario	S4	Yes
Northwest Territories	S4	Yes
Quebec	SNR	Yes
Yukon Territory	S4	Yes
Labrador	SNR	Yes
Prince Edward Island	SNA	No

United StatesNNR

Province	Rank	Native
Vermont	SNA	No
Colorado	SNR	Yes
District of Columbia	SNR	Yes
Hawaii	SNA	No
Florida	SNR	Yes
Texas	SNR	Yes
Arizona	SNR	Yes
New Mexico	SNR	Yes
Maine	SNR	Yes
Connecticut	SNR	Yes
New York	SNR	Yes
Idaho	SNR	Yes
Kentucky	SNR	Yes
Wisconsin	SNR	Yes
Georgia	SNR	Yes
South Carolina	SNR	Yes
Alabama	SNR	Yes
Nebraska	SNR	Yes
California	SNR	Yes
Montana	SNR	Yes
North Carolina	SNR	Yes
Mississippi	SNR	Yes
Louisiana	SNR	Yes
Oklahoma	SNR	Yes
Iowa	SNR	Yes
New Jersey	SNR	Yes
Virginia	SNR	Yes
Oregon	SNR	Yes
Delaware	SNR	Yes
Nevada	SNA	No
Utah	SNR	Yes
Washington	SNR	Yes
North Dakota	SNR	Yes
Rhode Island	SNA	No
Wyoming	SNA	No
South Dakota	SNR	Yes
Arkansas	SNR	Yes
Massachusetts	SNR	Yes
Alaska	SNR	Yes
West Virginia	SNR	Yes
Indiana	SU	Yes
Ohio	SNR	Yes
Tennessee	SNR	Yes
Pennsylvania	SNR	Yes
Michigan	SNR	Yes
Illinois	SNR	Yes
Kansas	SNR	Yes
Minnesota	SNA	No
New Hampshire	SNR	Yes
Maryland	SNR	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (32)

Alaska (3)

Area	Forest	Acres
College Fiord	Chugach National Forest	1,130,818
Fidalgo-Gravina	Chugach National Forest	257,968
Rhine	Tongass National Forest	23,010

Arizona (2)

Area	Forest	Acres
Hell Hole	Apache-Sitgreaves National Forests	15,512
Lower San Francisco	Apache-Sitgreaves National Forests	59,310

California (11)

Area	Forest	Acres
Caliente	Cleveland National Forest	5,953
Coyote North	Inyo National Forest	11,932
Devil's Gate (CA)	Humboldt-Toiyabe National Forest	9,946
Hoover - Mt.olsen	Humboldt-Toiyabe National Forest	624
Mt. Jackson	Humboldt-Toiyabe National Forest	20,721
Mt. Olsen	Inyo National Forest	2,161
Rock Creek West	Inyo National Forest	3,626
San Dimas	Angeles National Forest	7,160
Sespe - Frazier	Angeles National Forest	4,254
Sugarloaf	San Bernardino National Forest	8,206
Westfork	Angeles National Forest	4,407

Montana (2)

Area	Forest	Acres
Big Snowy Mountains Wsa	Lewis and Clark National Forest	88,003
Reservation Divide	Lolo National Forest	16,908

Nevada (8)

Area	Forest	Acres
Mystic (NV)	Humboldt-Toiyabe National Forest	5,644
Pine Grove South	Humboldt-Toiyabe National Forest	88,945
Rose - Alum Creek	Humboldt-Toiyabe National Forest	853
Rose - Davis Mdw.	Humboldt-Toiyabe National Forest	2,361
Rose - Dutch Louie	Humboldt-Toiyabe National Forest	363
Rose - Northeast	Humboldt-Toiyabe National Forest	550
Rough Creek	Humboldt-Toiyabe National Forest	8,476
South Schell	Humboldt-Toiyabe National Forest	125,614

New Mexico (1)

Area	Forest	Acres
Hell Hole	Gila National Forest	19,553

Oregon (1)

Area	Forest	Acres
Maiden Peak	Deschutes National Forest	26,432

Utah (3)

Area	Forest	Acres
Bull Valley	Dixie National Forest	10,911
East Mountain	Manti-Lasal National Forest	30,705
Moody Wash	Dixie National Forest	31,835

Virginia (1)

Area	Forest	Acres
Bear Creek	Jefferson National Forest	18,274

References (3)

Costea, M. and F. J. Tardif. 2003. Nomenclatural changes in the genus <i>Polygonum </i> section <i>Polygonum</i> (Polygonaceae). Sida 20(3):987-997.
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.