Plants › adder's-tongue family
rattlesnake fern
Botrypus virginianus
25,582 observations in the source records
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.
What the records say
- 25,582 observations are recorded in the imported source snapshot. Observation source
Easily confused with
Cutleaf GrapefernSceptridium dissectum
tansyTanacetum vulgare
leathery grapefernSceptridium multifidum
lowland brittle fernCystopteris protrusa
poison hemlockConium maculatum
spinulose wood fernDryopteris carthusiana
common brackenPteridium aquilinum
common ragweedAmbrosia artemisiifolia
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 26,896 |
|---|---|
| Canada | 5,735 |
| North Carolina | 2,767 |
| Alaska | 2,696 |
| Virginia | 2,165 |
| Ontario | 1,948 |
| New York | 1,796 |
| Tennessee | 1,694 |
| Maryland | 1,447 |
| Ohio | 1,217 |
Counts show where people looked, not only where it lives.
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | Ferns · Polypodiopsida |
| Order | adder's-tongues and allies · Ophioglossales |
| Family | adder's-tongue family · Ophioglossaceae |
| Genus | Botrypus |
Study it in a deck
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 rattlesnake fern with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.