Open Access Research Paper Views (766) Download (151) Floral diversity of the lowland ultrabasic forest in the Northern Sierra Madre Natural Park, Isabela, Luzon, Philippines Ma Visitacion D. Guingab J. Bio. Env. Sci.15( 5), 113-124, November 2019. Key: Philippine endemicsSpecies richnessThreatened SpeciesUltrabasic forest Details