Mad honey flower?

Mad honey is honey produced by bees which forage among Rhododendron. One has to be careful with the heather family of plants, Ericaceae. Although the family has everyday members like blueberries and cranberries, there are many relatives who are not above producing a little poison. These neurotoxins, the grayanotoxins, can make you very sick without killing you. But in low doses they are hallucinogenic. Mad honey, a small batch specialty from Nepal, contains nectar infused with grayanotxins from many species of rhodo. Interestingly, the buransh (R. arboreum with its dark red flowers) contains only very small quantities of these toxins. That’s why drinking the juice commonly available in Uttarakhand is neither toxic nor hallucinogenic. All this background did not help me to identify the rhodo flowers which I saw in a mild December in Darjeeling’s botanical garden.