Horticulture 202 Laboratory 3


How to Write a Scientific Name

Practice Writing a Scientific Name

What is a Key?

Rules For Using a Key

Sample Key

Key Tutorial

Horticultural Sites


Rules For Using a Key

In order to successfully "key out" a plant, it is important to keep the following rules in mind.

Read both contrasting statements (a couplet) completely. Even if the first choice sounds correct, the second may be more correct.

If a term is unfamiliar, look up its definition--do not guess!

Make measurements with a ruler--do not guess!

Nature is highly variable, look at several samples before deciding. Never rely on just one sample.

If in doubt about a choice, follow it both ways, then choose between the final plant names given.

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This site was created by Michelle Meche and is maintained by David Wm. Reed. Any comments or suggestions should be e-mailed to D.W. Reed at e-mail: dwreed@tamu.edu. If you use
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