Bottle Gentian is a late-season wildflower whose deep blue flowers never fully open, remaining permanently closed. Only bumblebees are strong enough to force their way inside to reach the pollen and nectar. It blooms in September and October in moist prairies and meadows, providing critical late-season resources for foraging bumblebees.
Best time to see a Bottle Gentian
The best time to see a Bottle Gentian is September, when about 68% of U.S. sightings happen, based on 4,900 research-grade iNaturalist observations.
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