Costus is a group of perennial herbaceous plants in the family (Costaceae) described by Linnaeus as a genus in 1753.
 It was formerly known as "Hellenia" after the Finish botanist Carl Niclas von Hellens.
 It is widespread through tropical and subtropical regions of Asia, Africa, and the Americas.
Bedfordia is a genus of flowering plants belonging to the family Asteraceae.
 The genus includes 3 species, all endemic to Australia.

Question: Costus and Bedfordia are examples of what?
Answer: genus of flowering plants