Some of the hillocks in the Pandimotta and Alvarkurichi have dense growth of reeds sometimes growing as pure patches. Thick reed brakes are also seen in the lower valleys, along the streams and fire burnt areas. Important species are Ochlandra travancorica var. hirsute, O. ebracteata, O. scriptoria and O. wightii of which Ochlandra travancorica var. hirsutea and O. scriptoria are found in the higher riches.
The palm, Bentinckia condapanna is also seen growing gregariously along the hills of Pongumala, often covering the hillocks at Pandimotta.