Plants › knotweed family
low smartweed
Persicaria longiseta
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
spotted lady's thumbPersicaria maculosa
Far Eastern smartweedPersicaria extremiorientalis
pinkweedPersicaria pensylvanica
Asian lady's thumbPersicaria posumbu
pale smartweedPersicaria lapathifolia
water smartweedPersicaria amphibia
Oriental lady's-thumbPersicaria cespitosa
slender knotweedPersicaria decipiens
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 42,562 |
|---|---|
| New York | 3,927 |
| Pennsylvania | 3,707 |
| Virginia | 3,348 |
| North Carolina | 3,293 |
| Ohio | 2,845 |
| Maryland | 2,791 |
| New Jersey | 2,698 |
| Massachusetts | 2,305 |
| Illinois | 1,974 |
Counts show where people looked, not only where it lives.
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | Dicots · Magnoliopsida |
| Order | pinks, cactuses, and allies · Caryophyllales |
| Family | knotweed family · Polygonaceae |
| Genus | knotweeds, smartweeds, and waterpeppers · Persicaria |
Study it in a deck
- Plants of Charleston County, South Carolina, United States
- Plants of Richmond city, Virginia, United States
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.
- How much to rely on each source
Remember the name next time.
Practise low smartweed with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.