Plants produce several chemically diverse bioactive substances that may influence the growth and development of other organisms when released into environment in a phenomenon called allelopathy. Several these allelopathic species also have reported medicinal properties. In this study, potential effects more than hundred plants from Cambodia were tested using dish pack method. The bioassay metho...

A new prenylated pyranoxanthone, symphonin (1), 2-(3,3-dimethylallyl)-1,5dihydroxy-6,7-dimethoxy-2”,2”-dimethylpyrano (5”,6”:3,4) xanthone, the known compounds guttiferone A, oleanolic acid and sitosterol were isolated from the methanol extract of the seeds of Symphonia globulifera (Guttiferae). The structural elucidation of the new compound was based mainly on spectroscopic analyses. The new x...

Vegetative anatomical studies of 10 species of Garcinia L., described by earlier workers to be present in Sri Lanka were carried out. A detailed anatomical investigation of lamina, petiole, young stem and wood, was carried out and the results were analyzed by statistical methods. The study agrees with previous workers in that there are 10 Garcinia species in Sri Lanka. Further, it also revealed...