He was born on January 4, 1933. Dr. Zamora is recognized for his works to plant anatomy-morphology, pteridophyte biology, and the preservation of environment and natural resources policy study. His work on the xylem elements of vascular plants is the basis for the formulation of the two-phase wall deposition concept now accepted universally. His researches on the taxonomy of Philippine ferns led to the detection for additional species of the group.
Dr. Prescillano Zamora was a Rockefeller Foundation member at Cornell University in 1961-1965, also a NSF Research grantee in 1962-1965 and UP Professorial Chair holder in 1977-1980.