Dipterocarpus, survival during glacial period.
"More Letters of Charles Darwin Volume II" by Charles Darwin
Among the trees the most gigantic was a species of Dipterocarpus, probably the same with that I have gathered on Pator hill, Mergui.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
No Dipterocarpus trees occur.
"In the Andamans and Nicobars" by C. Boden Kloss