Analysis of information sources in references of the Wikipedia article "असोला भट्टी वन्य अभयारण्य" in Hindi language version.
... The Ridge and its neighbouring hilly tracts represent the natural flora. The major natural forests in Delhi are generally restricted to the Ridge. The natural flora is a tropical, thorny and secondary forest.
... These ridges are prolongations of the Aravali mountain system, and are approximately on the line of the Indo-gangetic watershed ...