Originally published in 1921, this book presents a detailed account 'of the two Devonian land floras'. Illustrative figures and textual notes are incorporated throughout. This book will be of value to anyone with an interest in the Devonian period, botany and the history of science.

The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has over 10,000 employees that collect, monitor, and analyze data so that they have a better understanding of our problems. The USGS is dedicated to provide reliable, investigated information to enhance and protect our quality of life. This is one of their circulars.

Also Edited By William Gilson Farlow, And Assisted By Other Botanists. Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.

The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has over 10,000 employees that collect, monitor, and analyze data so that they have a better understanding of our problems. The USGS is dedicated to provide reliable, investigated information to enhance and protect our quality of life. This is one of their reports.

Also Edited By William Gilson Farlow, And Assisted By Other Botanists. Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.

Also Edited By William Gilson Farlow, And Assisted By Other Botanists. Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.