Silphium laciniatum is a species of flowering plant in the family Asteraceae known commonly as compassplant or compass plant. It is native to North America. A newly emerging leaf grows in a random direction, but within two or three weeks it twists on its petiole clockwise or counterclockwise into a vertical position. Studies indicate that the sun's position in the early morning hours influences the twisting orientation. Wikipedia
You can help scientists understand how climate change is impacting this species by using the phenophase guide below to observe its lifecycle in Nature's Notebook.
Compass Plant Phenophase Guide
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