The flora of the Siracha area (Chon Buri Province) was extensively sampled by Mrs. D.J. Collins mostly during the 1920's. Jacobs (1962) notes that Mrs. Collins was inspired by Dr. A.F.G. Kerr, the most outstanding and active plant collector ever in Thailand, in 1911. Mrs. Collins collected some 2501 specimens most of which came from the Siracha area, but unfortunately none of her field notes have ever been published. Mrs. Collins was not a trained botanist, therefore almost all of her specimens were identified by Kerr in Bangkok or Craib at Kew. There was never an enumeration of the Siracha flora ever published. Only a few specimens were collected in the Sattahip area most of which came from Ko Khram (Khram Island) by Mrs. Collins, and collectors since her time have also generally neglected this and most all other areas in Province. No extensive floristic work was ever done in the Siracha area before this present research. Fortunately most of the specimens that Mrs. Collins collected in the Siracha and Sattahip areas have been enumerated in Florae Siamensis Enumeratio (1925-1962, incomple), but adequate field information form most of her specimens is generally lacking.