Costus woodsonii

Costus woodsonii, the red button ginger or scarlet spiral flag, is a species of flowering plant in the family Costaceae, native to Nicaragua, Costa Rica, Panama, and Colombia. A rhizomatous geophytic perennial, it is recommended for coastal gardens, borders, containers, and general wet, tropical garden applications.

The inflorescence of C. woodsonii has bracts that produce extrafloral nectar. This nectar attracts ants that interfere with oviposition by herbivores of the plant.