Chamaecostus cuspidatus, common name fiery costus or spiral flag, is a species of herbaceous plant in the family Costaceae native to eastern Brazil (States of Bahia and Espírito Santo).

[1][2][3] In India, it is known as insulin plant for its purported anti-diabetic properties.

The undersides of these large, smooth, dark green leaves have light purple shade.

The leaves are spirally arranged around the stem, forming attractive, arching clumps arising from underground rootstocks.

Flowering occurs during the warm months and they appear to be cone-like heads at the tips of branches.