There are 2,532 species of vascular plants represented by 1,034 genera and 199 families in the protected sites. Some 130 endemic species are found in the protected sites. For ecology and vegetation purposes Nepal could be divided into four floristic regions i.e. (a) western (b) north-western (c) central, and (d) eastern, and bio-climatically these are broken down into twenty regions from humid tropical climate to the arid, alpine regions. But for the purpose of identifying Nepal’s flora for the special interest tourist, the following shows the zones from the point of view of altitude i.e. Tropical zone (below 1,000 m), Sub-tropical Zone (1,000 to 2,100 m), Temperate Zone (2,100 to 3,100 m), Sub-alpine Zone (3,100 to 4,100 m), the Alpine Zone (4,100 to 4,500 m), and the Alpine Steppe region. There are 399 endemic flowering plants in Nepal of which about 63% are from the High Mountains, 38% from the Mid Hills, and only 5% from the Tarai and Siwaliks. Similarly, the central region contains 66% of the total endemic species followed by western (32%) and eastern regions (29%).