White Snakeroot in Bloom, Ralph Morgan Park, Cheltenham Township, PA

Photo of White Snakeroot (Ageratina altissima)

plant with opposite, coarsely serrated triangular leaves and clusters of many small bright white flowers

Taken on Aug. 1, 2014

This photo shows a white snakeroot plant in bloom; it was one of the earliest plants to bloom in the surrounding neighborhood, blooming a few weeks before many of the plants of this species started.

This photo shows clear views of the trails left by the larvae of a leaf miner, possibly Liriomyza eupatoriella.

Location

Ecoregion

Photographer & Copyright

CC BY-SA 4.0

Inclusion in Plant ID / Comparison Guides

This photo is featured in 2 plant ID/comparison guides:

collage of White Snakeroot and Late Boneset

White Snakeroot (Ageratina altissima) vs. Late Boneset (Eupatorium serotinum)

Updated October 13th, 2024

These closely-related plants can be tricky to distinguish, especially early in the season, before they bloom. Although they have some overlap in habitat, late boneset ranges farther south and prefers sunnier, wetter habitats, and is more tolerant of acidic soil, whereas white snakeroot ranges farther north and prefers shadier, drier conditions but requires more neutral soils.

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The other guide is not yet completed and published.