Hopea cagayanensis

References

1. [1]Flora Malesiana Series 1 — Various · Nationaal Herbarium Nederiand, Universiteit Leiden branch · http://www.archive.org ↩︎A massive treatment of the plants of the Malaysian Archipelago. Much of it has been made available to download from the Internet
2. [2]IUCN Red List of Threatened Species — http://www.iucnredlist.org/ ↩︎A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
3. [3]The Philippine Journal of Science Vol. 22 — Merrill E.D. (Editor) · Bureau of Science; Manila, · 1923 · http://www.biodiversitylibrary.org ↩︎A botanical journal, rather dated but containing some good information on the woods of the Philippines. It can be downloaded from the Internet.