In thinking about four-petal flowers of significance in Filipino culture, there is the Santan flower that has some importance--see http://www.psst.ph/top-7-flower-sym...gs-philippines/
Santan or Ixora coccinea The flowering plants are normally planted near the entrance of one’s house. People believe that the blooming santan can ward off evil spirits and is a good luck plant when grown in large numbers. Flowers are also offered to young maidens which symbolizes the burning passion for their career and love. Recently , there is growing trend among bonsai hobbyists to use them as material for bonsai. This plant is easily grown through cuttings.
Commonly grown as a low hedge throughout the Philippines. Picture attached.