Polygonum majus
Table of Contents
Details Top
| Internal ID | UUID64404b692cc5d041601779 |
| Scientific name | Polygonum majus |
| Authority | Piper |
| First published in | Fl. Palouse Reg. : 63 (1901) |
Description Top
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Polygonum majus, also known as wiry knotweed, is a North American plant found in the western United States and western Canada. It is a low-growing annual weed with tiny blue-green leaves and inconspicuous whitish-green flowers. It can form a dense mat and is difficult to control, often appearing in unexpected places in gardens and lawns. Knotweed has slender stems and a thin taproot, and it spreads through its wiry stems and tiny seeds. It is commonly confused with garden spurge, but can be distinguished by the absence of a milky liquid when split. Knotweed is most effectively controlled through the use of herbicides, with glyphosate being the most effective when applied at the proper growth stage and dosage. It is an invasive species and its rhizomes are responsible for its spread and damage. Research has shown that glyphosate is the most effective control method, but its use may be restricted in certain areas due to environmental concerns. Other physical control methods, such as cutting and mowing, have been found to be less effective.
Synonyms Top
| Scientific name | Authority | First published in |
|---|---|---|
| Polygonum douglasii subsp. majus | (Meisn.) J.C.Hickman | Madroño 31(4): 250. 1984 |
| Polygonum coarctatum var. majus | Meisn. | Prodr. [A. P. de Candolle] 14(1): 101. 1856 [mid Oct 1856] |
Germination/Propagation Top
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No germination or propagation data was added yet.
Distribution (via POWO/KEW) Top
Legend for the distribution data:
- Doubtful data
- Extinct
- Introduced
- Native
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Northern America click to expand
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Northwestern U.S.A.
- Colorado
- Idaho
- Oregon
- Washington
- Wyoming
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Southwestern U.S.A.
- California
- Nevada
- Utah
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Western Canada
- British Columbia
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Northwestern U.S.A.
Links to other databases Top
Suggest others/fix!| Database | ID/link to page |
|---|---|
| World Flora Online | wfo-0001101035 |
| Canadensys | 8180 |
| Tropicos | 26000866 |
| KEW | urn:lsid:ipni.org:names:206288-2 |
| The Plant List | tro-26000866 |
| Open Tree Of Life | 3943773 |
| NCBI Taxonomy | 1825751 |
| IPNI | 206288-2 |
| iNaturalist | 78685 |
| GBIF | 5651766 |
| EOL | 1277532 |
| Calflora (Californian flora) | 11035 |
| Wikipedia | Polygonum_majus |
Genomes (via NCBI) Top
No reference genome is available on NCBI yet. We are constantly monitoring for new data.
Phytochemical Profile Top
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Collections Top
| In private collections | 0 |
| In public collections | 0 |