Rare Samar Rafflesia Rediscovered in Protected Forest After 15 Years

One of the country’s rarest flowering plants, the endangered Samar Rafflesia (Rafflesia manillana), has been documented once again inside the protected forests of Samar Island, marking its first confirmed sighting in 15 years and underscoring the island’s status as one of the Philippines’ most important biodiversity hotspots. The rare parasitic plant was recorded during an exploratory survey conducted by the Samar Island Natural Park (SINP) Protected Area Management Office, which wanted to determine the current distribution and condition of these species within the country’s largest terrestrial protected area. The SINP posted the story on its Facebook account on Monday, June 29. The Samar Rafflesia was last documented in March 2011. Its recent rediscovery provides conservationists with renewed hope that viable populations of the endangered species are surviving despite increasing threats to forest ecosystems. The identity of the plant was confirmed by botanists Dr. Pastor Malabrigo Jr. and Dr. Julie Barcelona, both recognized experts in Philippine plant biodiversity. The survey aimed to locate and map existing populations of Rafflesia manillana and gather field data would guide future conservation strategies, habitat management, and long-term monitoring of the species. Under Department of Environment and Natural Resources (DENR) Department Administrative Order No. 2026-20, Rafflesia manillana, locally known as the Samar Rafflesia, is classified as an endangered species due to its extremely limited distribution and vulnerability to habitat destruction. Unlike ordinary flowering plants, Rafflesia is a holoparasitic species that survives entirely by attaching itself to the roots and stems of vines belonging to the genus Tetrastigma. It has no leaves, stems, or roots of its own and spends most of its life hidden inside its host before producing a massive flower that blooms for only a few days. Its distinctive odor, often compared to decaying flesh, attracts flies that serve as its pollinators. The Samar Island Natural Park, spanning the provinces of Samar, Northern Samar, and Eastern Samar, covers more than 333,000 hectares, making it the largest terrestrial protected area in the Philippines under the National Integrated Protected Areas System (NIPAS). The park preserves one of the country’s last remaining expanses of old-growth tropical rainforest and serves as a critical watershed supplying water to hundreds of communities across the island. Apart from the Samar Rafflesia, SINP is home to numerous endemic and threatened wildlife species, including the Philippine eagle, Philippine tarsier, Philippine warty pig, Philippine spotted deer, Philippine flying lemur, the Samar hornbill, and several species of rare amphibians, reptiles, orchids, and forest trees found only on Samar Island. Environmental officials said the rediscovery demonstrates the continuing ecological importance of the protected area and reinforces the need to strengthen biodiversity monitoring and forest protection efforts against illegal logging, land conversion, poaching, and other human activities that threaten fragile ecosystems. The Protected Area Management Office said it remains committed to expanding scientific research and conservation initiatives to safeguard the Samar Rafflesia and other rare species inhabiting the park. Conservationists noted that each successful documentation of endangered species inside SINP provides valuable scientific information, while highlighting the importance of protecting Samar’s remaining forests, considered among the country’s last strongholds of unique and irreplaceable biodiversity.