Flower - Macro Photography

During the raining season on one afternoon hour, I took a stroll around my area to what's happening in the surrounding. While passing through a certain area, I stumbled upon these flower. They were striking, their leaves were green while the main core were yellowish.

They caught my attention and I thought it would be nice to take a couple shots and them here. Unfortunately I don't know it's name. There were two that have blossomed while two were still coming up.