All is not well with the world famous Valley of Flowers in Garhwal Himalayas. Scientists at the Almora-based G.B. Pant Institute of Himalayan Environment and Development have warned thatthe rich floral wealth of the national park is facing a new threat - proliferation of 'Dodder', a parasitic plant. According to the scientists, the plant, which coils around stems of the host plants and thrives on the nutrition it drains from them, has ben found on different species of medicinal and flowering plants across the valley in patches.