Polygonum aviculare ssp. depressum
common knotweed, oval-leaf knotweed
Specimens
Photos
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Roadsides, wastelots, and other disturbed areas.
Flowers: April-October
Origin: Introduced from Europe
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Polygonum aviculare L. ssp. depressum (Meisn.) Arcang.
Publication: Comp. Fl. Ital. 583. 1882.
Publication: Comp. Fl. Ital. 583. 1882.
Synonyms & Misapplications:
Polygonum aequale Lindm.
Polygonum arenastrum Boreau [JPM, ILBC4]
Polygonum aviculare L. ssp. aequale (Lindm.) Asch. & Graebn.
Polygonum aviculare L. ssp. calculatum (Lindm.) Thell.
Polygonum aviculare L. ssp. microspermum (Jordan ex Boreau) Berher
Polygonum aviculare L. var. depressum Meisn.
Polygonum calcatum Lindm.
Polygonum microspermum Jordan ex Boreau
Polygonum montereyense Brenckle
Polygonum arenastrum Boreau [JPM, ILBC4]
Polygonum aviculare L. ssp. aequale (Lindm.) Asch. & Graebn.
Polygonum aviculare L. ssp. calculatum (Lindm.) Thell.
Polygonum aviculare L. ssp. microspermum (Jordan ex Boreau) Berher
Polygonum aviculare L. var. depressum Meisn.
Polygonum calcatum Lindm.
Polygonum microspermum Jordan ex Boreau
Polygonum montereyense Brenckle
Additional Resources:
PNW Herbaria: Specimen records of Polygonum aviculare ssp. depressum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Polygonum aviculare ssp. depressum checklist entry
OregonFlora: Polygonum aviculare ssp. depressum information
E-Flora BC: Polygonum aviculare ssp. depressum atlas page
CalPhotos: Polygonum aviculare ssp. depressum photos
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