Fireweed's pink blooms are lighting up nature apps right now
iNaturalist Community
Native Plants
If you spot a tall spike of magenta flowers blooming from the bottom up along a trail, roadside, or old burn scar this month, you're likely looking at fireweed at peak bloom, and logging it helps scientists track exactly when that bloom happens each year.
Fireweed is a wildflower known for its tall spikes of pink-purple blooms and its habit of being one of the first plants to grow back after fires or land disturbance, which is how it got its name. Right now hundreds of people are photographing and logging it on iNaturalist, a sign that it's hitting peak bloom across much of its range. Watching when common plants like this flower each year is one of the simplest ways backyard naturalists contribute real data on shifting seasons.
Key Findings
334 research-grade fireweed observations were logged on iNaturalist in a single week
Fireweed ranked among the most-observed plant species on the platform during that period
The observation surge corresponds with the species' characteristic mid-to-late summer flowering window
chevron_right Technical Summary
Fireweed is having a big moment on iNaturalist this week, with 334 verified sightings logged by citizen scientists across its range. The spike lines up with its classic mid-to-late summer bloom, when its tall pink-purple flower spikes are hardest to miss.
Abstract Preview
Original paper
Trending: fireweed (Chamaenerion angustifolium) — 334 observations this week
fireweed is among the most observed plant species this week with 334 research-grade observations.
open_in_new Read full abstractAbstract copyright held by the original publisher.
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Chamaenerion angustifolium is a perennial herbaceous flowering plant in the willowherb family, Onagraceae. It is known in North America as fireweed and in the British Isles as both fireweed and rosebay willowherb. It is also known by the taxonomic synonyms Chamerion angustifolium and Epilobium an...