Sri Venkateswara National Park is a national park and biosphere reserve which is part of Seshachalam Hills. The total area of the park is 353 km2. The park is home for about 1,500 vascular plant species belonging to 174 families. Some of the rare and endemic plant species like red sanders, "Shorea talura", "Shorea thumburggaia", "Terminalia pallida", sandalwood, "Syzygium alternifolium", and "Psilotum nudum" occur in this region. "Cycas beddomei", a species of cycad in the genus Cycas, is found only in the Tirumala Hills.