Flora refers to all the plant life in a particular place or time period. When scientists study the flora of a rainforest, they're documenting every type of plant growing there: the towering trees, the vines snaking up their trunks, the ferns covering the forest floor, even the tiny mosses clinging to rocks. A desert has sparse flora adapted to survive with little water, while a wetland has lush flora that thrives in soggy soil.

Scientists often pair flora with fauna, which means all the animals in an area. Together, these words describe the complete living ecosystem: “The flora and fauna of the Galápagos Islands include unusual cacti and giant tortoises found nowhere else on Earth.”

You might see flora used in field guides: “A Guide to the Flora of North America” would help you identify plants across the continent. Ancient flora tells us what plants existed millions of years ago, like the giant ferns that covered Earth during the age of dinosaurs. Understanding an area's flora matters because plants form the foundation of every food chain, provide oxygen, and shape the landscape itself.