Flora in Virachey National Park

Dense semi-evergreen lowland and montane forest, upland savannah, bamboo thickets and occasional patches of mixed deciduous forest dominate the vegetation of Virachey National Park. Hills and low mountains dominate the topography of the area, with most areas lying higher than 400 m above sea level, and elevations reaching over 1,500 m above sea level along the border with Lao P.D.R. and Vietnam. Grassland and scrubland formations are found in isolated areas as well as marshes.

The literature describes two broad vegetation formations for Virachey National Park:

• Humid medium elevation formations (above 600 metres)
• Humid low elevation formations

These two vegetation formations are found in seven landscapes, each with its own predominant vegetation:

Medium elevation landscapes

• Montane slopes
• Montane peneplain

Low elevation landscapes

• Middle valley reaches
• Valley floors
• Western lowland
• Isolated granite outcrops
• Wetland