Plants › pondweed family
grass-wrack pondweed
Potamogeton compressus
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
Sharp-leaved PondweedPotamogeton acutifolius
Bluntleaf PondweedPotamogeton obtusifolius
Berchtold's pondweedPotamogeton berchtoldii
Curly-leaf PondweedPotamogeton crispus
eel-grass pondweedPotamogeton zosteriformis
Fries' PondweedPotamogeton friesii
Hairlike PondweedPotamogeton trichoides
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 9,245 |
|---|---|
| Alaska | 9,235 |
| Russia | 78 |
| Moscow | 9 |
| Moscow Oblast | 9 |
| Tver Oblast | 9 |
| Nizhny Novgorod Oblast | 6 |
| Yaroslavl Oblast | 5 |
| Republic of Mordovia | 4 |
| Massachusetts | 3 |
Counts show where people looked, not only where it lives.
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | monocots · Liliopsida |
| Order | Aroids, Water Plantains, Seagrass, and allies · Alismatales |
| Family | pondweed family · Potamogetonaceae |
| Genus | Pondweeds · Potamogeton |
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 grass-wrack pondweed with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.