Douglas' Knotweed

Polygonum douglasii Greene

Image of Polygonum douglasii ssp. douglasii
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San Diego Natural History Museum. SDNHM. Year: 2015. Barcode of Life Data Systems
Herbarium..
01180269
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Adams, R. s.n., US National Herbarium Sheet 253756, Barcode 01180269
Image of Johnston's knotweed
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2009 Barry Breckling CalPhotos in DwC-A
In TJM2, changed to Polygonum sawatchense ssp. sawatchense
Image of Johnston's knotweed
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2009 Barry Breckling CalPhotos in DwC-A
In TJM2, changed to Polygonum sawatchense ssp. sawatchense
Image of Douglas' knotweed
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Biodiversity Institute of ontario. Year: 2012. Barcode of Life Data Systems
Herbarium Specimen..
01180257
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Rothrock, J. T. 758, US National Herbarium Sheet 100715, Barcode 01180257
01180258
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Newberry, J. S. s.n., US National Herbarium Sheet 100716, Barcode 01180258
01180263
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Brandegee, T. S. s.n., US National Herbarium Sheet 582659, Barcode 01180263
01180264
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Bolander, H. N. 6358, US National Herbarium Sheet 320096, Barcode 01180264
01180265
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Bolander, H. N. 4917, US National Herbarium Sheet 320092, Barcode 01180265
Polygonumdouglasii
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Matt Lavin Wikimedia Commons
Summary[edit] Description: English: Polygonum douglasii in Butte Co., Idaho, USA. Date: 29 June 2009. Source: originally uploaded to Flickr as Polygonum douglasii. Author: Matt Lavin. Permission(Reusing this file): CC-BY-SA. Camera location43° 22′ 41.96″ N, 113° 43′ 16.55″ W View all coordinates using: OpenStreetMap 43.378321; -113.721263.
01180266
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Brewer, W. H. 1950, US National Herbarium Sheet 320107, Barcode 01180266
2016.05.27 17.01.50 IMG 5979 - Flickr - andrey zharkikh
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Andrey Zharkikh Wikimedia Commons
Summary[edit] Description: Douglas' knotweed (Polygonum douglasii), Buckwheat family (Polygonaceae). Johnson Lakes Canyon, Kane County, Utah. Date: 27 May 2016, 17:01. Source: 2016.05.27_17.01.50_IMG_5979. Author: Andrey Zharkikh from Salt Lake City, USA.
Polygonum douglasii (4396340384)
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Matt Lavin Wikimedia Commons
Description: The solitary flowers are reflexed (strongly nodding) at anthesis. Date: 29 June 2009, 12:12. Source: Polygonum douglasii Uploaded by Jacopo Werther. Author: Matt Lavin from Bozeman, Montana, USA. Camera location43° 22′ 41.96″ N, 113° 43′ 16.55″ W View all coordinates using: OpenStreetMap 43.378322; -113.721264.
01180268
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Coulter, J. M. s.n., US National Herbarium Sheet 253760, Barcode 01180268
Polygonum douglasii (4396339678)
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Matt Lavin Wikimedia Commons
Description: The leaves are often narrow and almost grass-like. Date: 29 June 2009, 12:12. Source: Polygonum douglasii Uploaded by Jacopo Werther. Author: Matt Lavin from Bozeman, Montana, USA. Camera location43° 22′ 41.96″ N, 113° 43′ 16.55″ W View all coordinates using: OpenStreetMap 43.378322; -113.721264.
Polygonum douglasii (4974284660)
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Matt Lavin Wikimedia Commons
Description: The erect to ascending stems of Polygonum douglasii are those with the nodding green&white flowers. (A small stem of Epilobium angustifolium has fallen flat and the distal end is curving upward and bearing a couple of cylindrical fruits and many flower buds. A seedling of Viguiera multiflora with opposite leaves is to the left-hand side of this scene.). Date: 5 September 2010, 09:57. Source: Polygonum douglasii Uploaded by Tim1357. Author: Matt Lavin from Bozeman, Montana, USA. Camera location43° 44′ 29.2″ N, 110° 54′ 14.24″ W View all coordinates using: OpenStreetMap 43.741444; -110.903956.
01180270
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Smithsonian Institution, National Museum of Natural History, Department of Botany NMNH Botany in DwCA
Scribner, F. L. 241, US National Herbarium Sheet 797359, Barcode 01180270
2016.06.02 08.27.24 IMG 6351 - Flickr - andrey zharkikh
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Andrey Zharkikh Wikimedia Commons
Summary[edit] Description: Douglas' knotweed (Polygonum douglasii), Buckwheat family (Polygonaceae). Johnson Lakes Canyon, Kane County, Utah. Date: 2 June 2016, 08:27. Source: 2016.06.02_08.27.24_IMG_6351. Author: Andrey Zharkikh from Salt Lake City, USA.
Polygonum majus-5-26-04
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Thayne Tuason Wikimedia Commons
Summary[edit] Description: English: Polygonum douglasii Greene ssp. majus (syn: Polygonum majus) in southwest Idaho. Date: 26 May 2004. Source: Own work. Author: Thayne Tuason.
Image of Douglas' knotweed
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2008 Steve Matson CalPhotos in DwC-A
Polygonum douglasii (4974285422)
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Matt Lavin Wikimedia Commons
Description: The inflorescence of this species comprises solitary nodding flowers. Date: 5 September 2010, 09:58. Source: Polygonum douglasii Uploaded by Tim1357. Author: Matt Lavin from Bozeman, Montana, USA. Camera location43° 44′ 29.2″ N, 110° 54′ 14.24″ W View all coordinates using: OpenStreetMap 43.741444; -110.903956.
Image of Douglas' knotweed
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2008 Steve Matson CalPhotos in DwC-A
2016.05.27 17.02.41 IMG 5981 - Flickr - andrey zharkikh
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Andrey Zharkikh Wikimedia Commons
Summary[edit] Description: Douglas' knotweed (Polygonum douglasii), Buckwheat family (Polygonaceae). Johnson Lakes Canyon, Kane County, Utah. Date: 27 May 2016, 17:02. Source: 2016.05.27_17.02.41_IMG_5981. Author: Andrey Zharkikh from Salt Lake City, USA.