Hoya oreogena Kerr
This H.oreogena is collected from the east of Thailand. But it can be found in the north and south of Thailand too. It grows in the high altitude forest where the weather is cool all around year. The leave is lanceolate, very fleshy and succulent, light green and grabrous on the top side, very pubescent on the under side. It grows quite slowly. Its flower is similarly to H.carnosa but it is bigger and the corolla is recurved. This plant is quite hard to grow in Bangkok and get it bloom.