Four Philippine edible plants were analyzed for polyphenols and diosmetin. They were selected because they have been reported to contain diosmetin which is a non-widespread flavone and the active agent in some venoactive drugs for the treatment of varicose veins, hemorrhoids and other venous diseases. The plants analyzed were Citrofortunella microcarpa, Citrus aurantium Linn., Premna odorata Blanco and Luffa cylindrica Linn. The plant parts used were those that were not generally perceived to have much commercial value. The UV-Vis spectra at 431.5 nm of the DCM-soluble extracts showed the total polyphenolic content, expressed as quercetin, increases in the following order: P. odorata, L. cylindrica, C. aurantium, C. microcarpa. The HPLC chromatograms at 348 nm of the DCM-soluble extracts showed the presence diosmetin in all plant extracts. The retention times were: 4.250 mins in the rind of C. aurantium, 4.103 mins in the rind of C. microcarpa, 4.129 mins in the leaves of P. odorata, and 4.297 mins in the leaves of L. cylindrica. The diosmetin content increases in the following order: L. cylindrica, P. odorata, C. aurantium, C. microcarpa. This study concludes that the rind of the widely cultivated C. microcarpa, which are generally thrown as garbage, can be a very good source of polyphenolics, particularly the nonwidespread, venoactive and chemopreventive diosmetin. This abundant, but seemingly useless, material can be commercialized as dietary supplement.