plant used for medicine
costus plant
*Costus* is a group of perennial herbaceous plants in the family (*Costaceae*) described by Linnaeus as a genus in 1753. It is widespread through tropical and subtropical regions of Asia, Africa, and the Americas. Costus is often characterized and distinguished from relatives such as *Zingiber* (true ginger) by its spiraling stems. The genus as a whole is thus often called spiral gingers. [https://en.wikipedia.org/wiki/Costus]
costus spp.
spiral ginger
requires discussion