Red Flower is used in The Jungle Book as synonyme for fire.
From The Jungle Book Mowgli's Brothers...
“What is the Law of the Jungle? Strike first and then give tongue. By thy very carelessness they know that thou art a man. But be wise. It is in my heart that when Akela misses his next kill--and at each hunt it costs him more to pin the buck--the Pack will turn against him and against thee. They will hold a jungle Council at the Rock, and then--and then--I have it!” said Bagheera, leaping up. “Go thou down quickly to the men’s huts in the valley, and take some of the Red Flower which they grow there, so that when the time comes thou mayest have even a stronger friend than I or Baloo or those of the Pack that love thee. Get the Red Flower.”
By Red Flower Bagheera meant fire, only no creature in the jungle will call fire by its proper name. Every beast lives in deadly fear of it, and invents a hundred ways of describing it.
“The Red Flower?” said Mowgli. “That grows outside their huts in the twilight. I will get some.”