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Trending: eastern poison ivy (Toxicodendron radicans) — 923 observations this week
iNaturalist · 2026-05-23
Eastern poison ivy is surging in iNaturalist observations this week, with 923 research-grade sightings logged across its range. This spike likely reflects peak seasonal activity as the plant leafs out and hikers venture into woods and trails.
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923 research-grade observations recorded in a single week, ranking eastern poison ivy among the top observed plant species nationally
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Observation spike aligns with late-spring leaf-out period when urushiol-containing leaves are newly emerged and contact risk is elevated
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Citizen-science data captures real-time geographic distribution, helping track range shifts and density in suburban and urban-edge habitats
