Plant · GBIF taxon 3039209
Parthenocissus tricuspidata
parthenocissus tricuspidataAlso known as Boston Ivy, Japanese Ivy, Japanese Creeper, Grape Ivy
Boston ivy uses specialized adhesive disks at the tips of its branched tendrils to scale brick, stone, and wooden structures without penetrating mortar. Its glossy, three-lobed leaves form a dense green canopy through spring and summer before turning brilliant shades of scarlet and crimson in autumn. Dark blue berries ripen in late autumn, offering a critical food source for overwintering birds while human-made structures gain natural summer insulation.
Climbing VineDeciduousAutumn Foliage
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Sunlight
- Soil Nutrients
- Water
Predators
- Japanese Beetles
- White-Tailed Deer
- Spider Mites
ThreatsSevere pruning, systemic herbicides, extreme drought
HabitatsUrban walls, woodland edges, riverbanks, mountain slopes
Life span50 to 100+ years
Size / weightNot available
Classification
- OrderVitales
- FamilyVitaceae
- GenusParthenocissus
- Speciesparthenocissus tricuspidata
Range data is not available yet.
Interaction riskHigh
- Low
- Moderate
- High
- Very high
- Why interaction risk is high
- Berries and sap contain calcium oxalate crystals; wear gloves when handling and never ingest wild berries.
- Why it is dangerous
- Contains needle-like calcium oxalate crystals in the sap and fruit that cause severe mouth irritation, swelling, and skin rashes.
- How to recognize a risky encounter
- Look for dense climbing vines with glossy three-lobed leaves and tiny adhesive pads on the tendril tips.
- What to do
- Wear gloves and long sleeves when pruning or touching the vine, and wash skin thoroughly with soap if contact occurs.
Responsible observation
- Wall care: Allow adhesive holdfasts to remain on masonry, as pulling live vines directly can pull away delicate mortar.
- Pruning timing: Trim foliage aggressively in late winter before new growth emerges to keep window frames and gutters clear.
- Pet safety: Plant away from dog runs or cat areas to prevent pets from chewing on fallen toxic berries.
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