Polygonum aviculare
WTU specimens
Other herbaria

Distribution: An introduced, ubiquitous weed, found throughout the United States.

Habitat: Dry or slightly moist, disturbed soil, often where hard-packed.

Flowers: July - September

Origin: Both native and introduced

Conservation Status: Not of concern

Description:
General:

Highly variable species, prostrate and spreading (but not rooting at the nodes) to occasionally erect, freely-branched annual, the stems terete, striate, up to 1 m. long.

Leaves:

Numerous, bluish-green, only slightly reduced upward, narrowly oblong, 1-3 cm. long and 2-6 mm. broad, narrowed to a very short, jointed petiole; stipules lacerate, 3-6 mm. long.

Flowers:

1-3 in the axils of the leaves or leaf-like bracts, the pedicles 1-3 mm. long, erect; perianth 2.5 mm. long, divided 2/3 the length, the segments 5, oblong, sub-equal, greenish with white to pink or red margins.

Fruits:

Achene with 3 sharp angles, brownish, smooth.

Accepted Name:
Polygonum aviculare L.
Publication: Sp. Pl. 1: 362. 1753.

Synonyms & Misapplications:
(none provided)
Infraspecies:
Additional Resources:

PNW Herbaria: Specimen records of Polygonum aviculare in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Polygonum aviculare checklist entry.

E-Flora BC: Polygonum aviculare atlas page.

CalPhotos: Polygonum aviculare photos.

USDA Plants: Polygonum aviculare information.

24 photographs:
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