Plants › Cashew Family
western poison ivy
Toxicodendron rydbergii
33 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
eastern poison ivyToxicodendron radicans
box elderAcer negundo
wild sarsaparillaAralia nudicaulis
Virginia creeperParthenocissus quinquefolia
Pacific poison oakToxicodendron diversilobum
Jack-in-the-PulpitArisaema triphyllum
fragrant sumacRhus aromatica
Japanese creeperParthenocissus tricuspidata
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| Canada | 13,565 |
|---|---|
| United States | 11,666 |
| Ontario | 7,387 |
| Minnesota | 2,249 |
| British Columbia | 2,212 |
| Colorado | 1,865 |
| Alberta | 1,541 |
| New York | 1,505 |
| Manitoba | 1,404 |
| Wisconsin | 1,333 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Toxic to humansListed as toxic or not suitable as food for humans by a harvested source.Kew World Checklist of Useful Plant Species
- Medicinal useListed as having medicinal use by a harvested source. This is not medical advice.Kew World Checklist of Useful Plant Species
- Shrub growth formListed by a harvested source as having a shrub or bush growth form.USDA PLANTS Characteristics
- Subshrub growth formListed by a harvested source as having a subshrub growth form.USDA PLANTS Characteristics
- Vine growth formListed by a harvested source as having a vine or climbing growth form.USDA PLANTS Characteristics
- Forb or herb growth formListed by a harvested source as having a forb or herbaceous growth form.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 | Dicots · Magnoliopsida |
| Order | Soapberries, Cashews, Mahoganies, and Allies · Sapindales |
| Family | Cashew Family · Anacardiaceae |
| Genus | poison ivies and oaks · Toxicodendron |
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.
- 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 western poison ivy with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.