Poppy

The Poppy is a fairly common flower and can be used to craft one Rose Red Dye. Poppies are commonly found in flower forests.

Locating
They naturally spawn in plains, forests, flower forests, etc. They are fairly common and can be broken by hand or tools

Trivia

 * They are one of the two flowers that can grow from Bone Meal while in Plains, the other being a Dandelion.
 * They are meant to replace Cyan Flowers which were removed in 0.9.0.
 * Even they can be used in Rose Red, Red Tulips, Red Mushrooms and Rose Bushes can also make red rose dye.
 * It is possible to create more poppies by using Bone Meal on them.