IUCN threat status:

Not evaluated

Comprehensive Description

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This native perennial plant is 1–1½' tall and unbranched. The central stem is largely hairless, except for a few hairs near the inflorescence. The leaves are up to 8" long and 1/3" across, becoming smaller and fewer as they ascend the stem. These leaves appear whorled because of their density, but they actually alternate around the stem.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© John Hilty

Source: Illinois Wildflowers

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