Plants › knotweed family
Giant Knotweed
Reynoutria sachalinensis
28 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Japanese knotweedReynoutria japonica
American pokeweedPhytolacca americana
Weyrich's KnotweedKoenigia weyrichii
greater burdockArctium lappa
broad-leaved dockRumex obtusifolius
lesser burdockArctium minus
princess treePaulownia tomentosa
European aspenPopulus tremula
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 12,188 |
|---|---|
| Alaska | 11,090 |
| Canada | 426 |
| Russia | 327 |
| New York | 271 |
| Germany | 248 |
| Pennsylvania | 162 |
| Sakhalin Oblast | 148 |
| Japan | 143 |
| Poland | 143 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Medicinal useListed as having medicinal use by a harvested source. This is not medical advice.Kew World Checklist of Useful Plant Species
- Fuel useListed as being used for fuel by a harvested source.Kew World Checklist of Useful Plant Species
- Restoration or landscaping useListed as being used for restoration, landscaping, ornamental planting, erosion control, soil improvement, shade, windbreaks, pollution indicators, or wastewater purification.Kew World Checklist of Useful Plant Species
Edibility, toxicity and medicinal traits are records from datasets, not advice. Never eat, handle or use a wild species on the strength of an app.
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | Dicots · Magnoliopsida |
| Order | pinks, cactuses, and allies · Caryophyllales |
| Family | knotweed family · Polygonaceae |
| Genus | Rhizomatous Knotweeds · Reynoutria |
Study it in a deck
- Medicinal Plants of Baltimore County
- Plants of Zaporizhia, Zaporizhia Oblast, Ukraine
- Trees of Maryland
Or build your own from the species near you.
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- Traits: Kew World Checklist of Useful Plant Species (CC BY 4.0)
- How much to rely on each source
Remember the name next time.
Practise Giant Knotweed with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.