Compass Plant

Silphium laciniatum


How it's classified:

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How it looks:

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 Blooming Months:

June July August September

Where, when and how often it grows and if it's native to Fermilab:

Typical Habitat:


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 Native to Fermilab:



The leaf is oriented in a north-south direction to expose the least amount of leaf surface to the sun. The plant transpires water to keep itself cool. By orienting itself, it minimizes the amount of transpiration. Prairie dock has flowers at the top of smooth, naked stems, while compass plants have leaves and flowers on the hairy stem.

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Last Update: May 18, 1998