Polygonum aviculare ssp. aviculare
common knotweed, yard knotweed
Specimens
Photos
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Disturbed ground.
Flowers: April-October
Origin: Introduced from Eurasia
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Polygonum aviculare L. ssp. aviculare
Publication: Sp. Pl. 1: 362. 1753.
Publication: Sp. Pl. 1: 362. 1753.
Synonyms & Misapplications:
Polygonum aviculare L. ssp. heterophyllum Asch. & Graebn.
Polygonum aviculare L. ssp. maximum (Lindm.) Asch. & Graebn.
Polygonum aviculare L. ssp. monspeliense (Thiéb.-Bern. ex Pers.) Arcang.
Polygonum aviculare L. var. vegetum Ledeb.
Polygonum heterophyllum Lindm.
Polygonum monspeliense Thiéb.-Bern. ex Pers.
Polygonum aviculare L. ssp. maximum (Lindm.) Asch. & Graebn.
Polygonum aviculare L. ssp. monspeliense (Thiéb.-Bern. ex Pers.) Arcang.
Polygonum aviculare L. var. vegetum Ledeb.
Polygonum heterophyllum Lindm.
Polygonum monspeliense Thiéb.-Bern. ex Pers.
Additional Resources:
PNW Herbaria: Specimen records of Polygonum aviculare ssp. aviculare in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Polygonum aviculare ssp. aviculare checklist entry.
OregonFlora: Polygonum aviculare ssp. aviculare information.
E-Flora BC: Polygonum aviculare ssp. aviculare atlas page.
CalPhotos: Polygonum aviculare ssp. aviculare photos.
USDA Plants: Polygonum aviculare ssp. aviculare information.
12 photographs:
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