The Jepson Manual, Higher Plants of California

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The Jepson Manual is a collection of identification keys to help biologists identify the vascular plants within the state of California. This large, illustrated book is generally regarded as one of the best resources for California botanists to study the characteristics of certain taxonomic groups.

The book is named for Willis Linn Jepson, who wrote most of the keys and was an influential California botanist.

Botanists often refer to this book simply as "Jepson."

Hickman, J.C. (Ed.), 1993. The Jepson Manual, Higher Plants of California.