Label source: Note to Mr Dallimore from L.A.B. : The ruler you left with me is made from the wood of one of the Anacardiaceae, probably a species of Melanorrhoea or Gluta. Ridley, in his list of Malay names, gives Kayu as meaning wood, and Rengas as appl, ied to Melanorrhoea Curtisii, M. Wallichii and Gluta rengas. L.A.B. 20.8. 29. Label source: Surg Col A W Sinclair. Royal Colonial Institute, Northumberland Ave. WC.2. Kuala Lumpur.