Prostrate knotweed – Polygonum aviculare

Prostrate knotweed plant

Prostrate knotweed plant

Prostrate knotweed flower

Prostrate knotweed flower

Prostrate knotweed seedling

Prostrate knotweed seedling

Prostrate knotweed ocrea

Prostrate knotweed ocrea

Prostrate knotweed

Polygonum aviculare L.
Polygonaceae (Smartweed family)
Life cycle
Prostrate, mat-forming summer annual.
Leaves
Alternate, narrow oval to oblong leaves with pointed tips, smooth margins and short petioles.
Stems
Prostrate, tough, wiry stems with distinct nodes are highly branched and mat-forming. Plants perform well in compacted areas. A membranous sheath (ocrea) surrounds the stem at the base of each petiole.
Flowers and fruit
Small, inconspicuous flowers are white to pinkish and clustered in the leaf axils. The seed is enclosed in a single-seeded, dark reddish brown, three-sided fruit.
Reproduction
Seeds.