Flora of Khao Sok
Khao Sok is teeming with lush vegetation and diverse plant life. The rainforest is home to around 200 different floral species per hectare, including an impressive variety of orchids and the famous Rafflesia, the largest flower in the world.
Exploring the Rare Rafflesia
in Khao Sok National Park
Scientific Name: Rafflesia kerrii
Local Name: Dok Bua Phut (Giant Rafflesia)
Family: Rafflesiaceae
Rafflesia kerrii is named after Sir Hugh Kerr, a British botanist who identified this species in Thailand. The genus name “Rafflesia” honors Sir Stamford Raffles, who first documented the flower in Sumatra in 1818.
This unique plant has no leaves, stems, or roots of its own. Instead, Rafflesia kerrii exists as a massive red or orange flower with white speckled patterns along its thick petals. It can grow up to 90 centimeters in diameter and weigh around 10 kilograms. As a parasitic species, it draws nutrients from the Tetrastigma vine, using specialized haustoria to access its host’s vascular system.
Rafflesia kerrii emits a strong odor resembling rotting flesh to attract carrion flies, which serve as its primary pollinators. As the flies search for food, they enter the flower’s central chamber, where they inadvertently collect pollen from a male flower and transfer it to a female flower. This process is delicate and has a low success rate, as both male and female flowers must bloom at the same time for pollination to occur.
The blooming period for Rafflesia kerrii typically falls between November and February, during the cooler, more humid months — the ideal environment for its growth. However, the flower remains in bloom for just a few days before it begins to decay, making the sight of a fully opened Rafflesia a rare and special experience.
As one of the world’s rarest flowers, Rafflesia kerrii holds significant ecological value. Its survival depends on the Tetrastigma vine and a fragile balance of environmental factors, making conservation efforts challenging. Threats such as deforestation, habitat loss, and unregulated tourism contribute to its declining numbers, underscoring the importance of protecting this botanical marvel.
Khao Sok National Park offers the perfect environment for Rafflesia kerrii to thrive, with its dense rainforest, high humidity, and the presence of Tetrastigma vines — the flower’s only host. These rare blooms are typically found along remote trekking trails, often at higher elevations, away from the more frequented tourist paths. Spotting a Rafflesia in full bloom requires planning, patience, and a bit of luck, as the flowers are scattered and bloom unpredictably.
In local folklore, Rafflesia is considered a mystical flower, believed to be protected by forest spirits. Some villagers say that harming or disturbing the flower brings misfortune, a belief that, in turn, promotes respect and conservation of this extraordinary plant and its delicate ecosystem.
For an unforgettable adventure, join a guided trekking tour to witness the rare and magnificent Rafflesia up close. Our experienced local guides have an in-depth understanding of the region’s flora and ecosystems, ensuring you have the best chance to see this extraordinary flower in bloom. Each tour is thoughtfully planned to offer a unique and immersive nature experience.
Tours can be booked via our website or by contacting us directly. We offer customizable trekking packages, including small group tours for a more personal and relaxed experience.
Don’t miss this rare opportunity to explore the hidden beauty of Khao Sok’s rainforest and see one of the world’s most unique and fascinating flowers in its natural habitat!
Email: info@therockjourney.com
WhatsApp: +66 96 652 9653
Phone: +66 96 652 9653