Centranthera tranquebarica

An indigenous herb of damp grassy places close to water sources, ponds or paddy fields in both dry and wet zones. Rather rare and flowering from May to February..

White Witchweed (Striga angustifolia)

 

An indigenous herb fairly common along roadsides and open country among short grass in the dry zone and in open grassy slopes of the wet lowlands and the hill country. The plant parasite the roots of grasses. Flowering from August to October and December to May. 

Parasopubia delphiniifolia [Syn: Sopubia delphiniifolia]

 An indigenous annual herb of open grassy places in the dry zone and the wet hill country from 500 to 1500 m elevations. Flowering from December to February and August to September.

Christisonia tricolor

Leafless endemic herb, parasitic on roots of mainly Acanthaceae and bamboo species. It occurs in lower montane forests up to about 1550 m a.s.l in Mathale, Kandy, Rathnapura and Nuwaraeliya districts.