Two aspects on the morphology and biology of the Philippine population of D. rotundifolia were not answered by Coritico and Fleischmann (2016), namely its seed morphology and seasonal growth cycle - especially regarding hibernaculum formation, as it is known from its temperate congeners. These gaps can now be covered from observations made from cultivated plants and shall be reported here. Further aspects on the biology of Philippine D. rotundifolia (and other tropical populations of temperate Drosera) in cultivation and natural habitat are presented.