Name: Costus igneous (Nak)
- Common name: Insulin plant
- Vernacular name: Bija-Sal
- Family: Costaceae
- Habit:Tropical evergreen herb
- Habitat: It needs sunshine but it also grows in slightly shady areas
- Flower: During the warm months
- Parts used: Leaves,rhizome
- Distribution: Southern Part of India
- Uses: Helps lower the blood glucose levels,anti oxidant