Plants › Cystopteridaceae
limestone oak fern
Gymnocarpium robertianum
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
northern oak fernGymnocarpium dryopteris
common brackenPteridium aquilinum
long beech fernPhegopteris connectilis
Nahanni oak fernGymnocarpium continentale
male fernDryopteris filix-mas
brittle bladderfernCystopteris fragilis
bulblet fernCystopteris bulbifera
Appalachian oak fernGymnocarpium appalachianum
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 5,400 |
|---|---|
| Alaska | 5,262 |
| Canada | 583 |
| Austria | 411 |
| Quebec | 224 |
| Ontario | 164 |
| Germany | 152 |
| Switzerland | 150 |
| France | 144 |
| Newfoundland and Labrador | 137 |
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
- Forb or herb growth formListed by a harvested source as having a forb or herbaceous growth form.USDA PLANTS Characteristics
- Fern growth formListed by a harvested source as belonging to the fern plant group.USDA PLANTS Characteristics
- Perennial plantListed by a harvested source as having a perennial life duration.USDA PLANTS Characteristics
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 | Ferns · Polypodiopsida |
| Order | Polypodiales |
| Family | Cystopteridaceae |
| Genus | oak ferns · Gymnocarpium |
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)
- Traits: USDA PLANTS Characteristics (U.S. Government work / public domain)
- How much to rely on each source
Remember the name next time.
Practise limestone oak fern with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.