Plants › Arum Family
Rootless Duckweed
Wolffia arrhiza
25 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
Columbian WatermealWolffia columbiana
Asian watermealWolffia globosa
Common DuckweedLemna minor
Brazilian watermealWolffia brasiliensis
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 9,280 |
|---|---|
| Alaska | 9,270 |
| Russia | 143 |
| Ukraine | 82 |
| Moscow Oblast | 48 |
| Bryansk Oblast | 37 |
| Kyiv Oblast | 31 |
| Poland | 19 |
| Canada | 17 |
| Kyiv | 16 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Forb or herb growth formListed by a harvested source as having a forb or herbaceous growth form.USDA PLANTS Characteristics
- Wetland-associatedListed by a harvested source as obligate or frequent in wetland habitat.USDA PLANTS Characteristics
- Perennial plantListed by a harvested source as having a perennial life duration.USDA PLANTS Characteristics
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | monocots · Liliopsida |
| Order | Aroids, Water Plantains, Seagrass, and allies · Alismatales |
| Family | Arum Family · Araceae |
| Genus | watermeals · Wolffia |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- Traits: USDA PLANTS Characteristics (U.S. Government work / public domain)
- How much to rely on each source
Remember the name next time.
Practise Rootless Duckweed with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.