Attaching photos of flowers of the tree from which the winged seeds posted earlier come from. Vijayasankar kindly suggested Dipterocarpus turbinatus as the ID. I looked it up and found that this species is critically endangered in the IUCN Red List. I would like to know the exact species name. Location: Makunda Christian Hospital campus, Karimganj District, Assam Date: 3rd April 2010 Equipment: Nikon D70 with Nikkor 70-300mm lens |