Hydrangea macrophylla
Identification suggestions (from the community or from AI) and the information here may be wrong; this app never confirms that anything is safe to eat. Do not consume wild plants, mushrooms or seafood without expert confirmation. Nothing here is medical advice.
Leaves and buds contain cyanogenic compounds; chewing them causes poisoning.
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Blue on acid soil, pink on limy soil
The showy parts are four sepals, not petals
Opposite, large, glossy, coarsely toothed leaves