The mad honey plant: Rhododendron species

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The mad honey plant: Rhododendron species

Mad honey is produced when bees forage on grayanotoxin-bearing Rhododendron species — primarily R. ponticum, R. luteum, R. arboreum, and R. campanulatum. These species grow at altitude in the Himalayas, Caucasus, and Pontic ranges. Not all rhododendrons produce grayanotoxin-bearing nectar.