[Knotweeds: The Genera Aconogonon, Fallopia, Persicaria and Polygonum in the Cascade Mountains of Oregon and Washington]

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed

Koenigia davisiae var. davisiae

Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Newberry's fleeceflower in bloom at left on sandy slopes along the Vista Ridge Ski Trail above Mt. Hood Meadows Ski Area.................July 25, 2010. The photo at right shows Newberry's fleeceflower in bloom on sandy slopes along the Vista Ridge Ski Trail above Mt. Hood Meadows Ski Area.................July 04, 2021.

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Newberry's fleeceflower as seen at left on the western portion of the summit of Lookout Mountain, northern edge of the Badger Creek Wilderness..........July 4, 2013. The photo at right shows Newberry's fleeceflower beginning to bloom at timberline along the Butte Camp Trail #238A, Mount Saint Helens National Volcanic Monument..........August 11, 2022.

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Newberry's fleeceflower as seen at left along the summit ridge of Lookout Mountain, northern edge of the Badger Creek Wilderness...........June 21, 2014. The photo at right shows Newberry's fleeceflower as seen along the Lowder Mountain Trail #3329, Three Sisters Wilderness.....June 23, 2018.

Fall color of Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Beautiful fall color beginning to show on Newberry's knotweed as seen at left atop Badger Peak in the Dark Divide, Gifford Pinchot National Forest..........August 22, 2014. The image at right shows Newberry's knotweed as seen near Lookout Mountain, Badger Creek Wilderness.....July 3, 2024.

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Another view of newberry's knotweed as seen at left on sandy soils above the Mt. Hood Meadows Ski Resort, Mt. Hood National Forest.........July 23, 2017. The photo at right shows newberry's knotweed as seen along trails between the trailhead at High Prairie and the summit of Lookout Mountain, Badger Creek Wilderness......June 29, 2023.

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) - Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

The photo at left shows Newberry's knotweed from Mt Hood, Mt Hood NF. The photo at right shows Polygonum newberryi from Sunrise, Mt Rainier National Park- early September, 1995.

Davis' Knotweed, Newberry's Fleeceflower, Newberry's Knotweed: Koenigia davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonon davisiae var. davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi)

Newberry's knotweed seen at Sunrise, Mt Rainier National Park- August 23, 1996.
Paul Slichter