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Table of Contents

This key is largely based upon Cooke's analytical key. Its use will help to locate the plant in hand in the genus to which it belongs.

The first thing the student should do is to determine the color of the spore if it is not evident. This is best done according to the plan described on page 15.

The plant should be fresh and mature. Careful attention should be given to different stages of development. The habit of the plant should be considered; then, as soon as the color of the spores is determined, it will be an easy matter to locate the genus by means of the key.