Species PlantsWhite Snakeroot

White Snakeroot

Ageratina altissima

CommonPlant
Illustration of White Snakeroot (Ageratina altissima)
Safety note: Toxic to livestock and humans if ingested.

White Snakeroot is a perennial plant with clusters of small, white flowers. It is infamous for causing milk sickness in the 19th century when ingested by cattle. Despite its toxicity, it is an important late-season nectar source for pollinators.

Habitat
It is commonly found in shady, wooded areas.
Diet
Pollinated by bees and other insects.
How common
Common

Best time to see a White Snakeroot

The best time to see a White Snakeroot is September–October, when about 73% of U.S. sightings happen, based on 71,905 research-grade iNaturalist observations.

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