[The Knotweeds and Smartweeds Found East of the Cascade Mts. of Oregon and Washington]

Common Knotweed, Doorweed, Prostrate Knotweed, Yard Knotweed

Polygonum aviculare

Common Knotweed, Doorweed, Prostrate Knotweed, Yard Knotweed: Polygonum aviculare

Prostrate knotweed as seen along Forest Service Road #1647 in southeastern Logan Valley, Malheur National Forest........August 3, 2011.

Common Knotweed, Doorweed, Prostrate Knotweed, Yard Knotweed: Polygonum aviculare - Common Knotweed, Doorweed, Prostrate Knotweed, Yard Knotweed: Polygonum aviculare

The photo above and below show close-ups of the leaves and flowers of prostrate knotweed as seen along road #82 at Snowking Snowpark on the southern slopes of Mt. Adams........October 2005. Note that the outer and inner series of tepals in individual flowers are the same length.

Paul Slichter