Invasive Species

Invasive Species of the Month

  • Chinese Yam - Invasive Species Chinese Yam (Dioscorea oppositifolia) The Chinese yam is a perennial vine native to Asia. The plant was introduced to the United States in the 1800's as a food source and is highly valued in traditional Chinese medicine. Since introduction, the Chinese yam has spread to 16 states, where it suppresses native ecosystems and reduces plant diversity. Despite the aggressive, invasive nature of the Chinese yam, the plant is still widely available as an ornamental. Chinese yam has not yet been found in Michigan; however sightings have been confirmed in Indiana, Illinois and Ohio.

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