Thiruvananthapuram, the southern-most district of Kerala, lying adjacent to Kanyakumari is physiographically divisible into coastal zone, having and extensive system of backwaters (Kayals), midland zone mostly under cultivation; and mountainous zone consisting of hills of elevations varying between 1000 and 1869 m. Owing to its significant geographic position in the southern end of W. Ghats, varied climate and altitude, the flora of this district has become very ...
