[Knotweeds of the Cascade Mountains of Oregon and Washington]

Fleeceflower, Alpine Knotweed, Jimson Knotweed, Pokeweed

Polygonum phytolaccaefolium

Synonym: Polygonum phytolaccifolium

Alpine Knotweed, Jimson Knotweed, Pokeweed Fleeceflower, Poke Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Synonym: Polygonum phytolaccifolium) - Alpine Knotweed, Jimson Knotweed, Pokeweed Fleeceflower, Poke Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Synonym: Polygonum phytolaccifolium)

Alpine knotweed as seen at left along the Boundary Trail #1 in Dark Meadows, Dark Divide, Gifford Pinchot National Forest..........July 3, 2015. The photo at right shows alpine knotweed along the Lowder Mountain Trail #3329, Three Sisters Wilderness.......June 23, 2018.

Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium) - Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium)

The photo above shows the fruits of alpine knotweed as seen along the Island Springs Trail........September 5, 2004.

Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium) - Stem leaf of Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium)

Alpine knotweed as seen along the Island Springs Trail.........September 5, 2004.

Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium) - Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium)

The photo above shows the inflorescence of alpine knotweed as seen on talus slopes just southwest of Bench Lake at Mt. Adams.........August 8, 2004.

Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Formerly Polygonum phytolaccifolium)

The photo above shows a close-up of the flowers of alpine knotweed as seen on talus slopes just southwest of Bench Lake at Mt. Adams........August 8, 2004.

Paul Slichter