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Presenter warns lesser celandine is carpeting local trails, threatening spring wildflowers

Lower Merion Township Sustainability Ambassadors (presentation) · July 27, 2026
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Summary

Jeff said at Windsor Trail in Gladwin lesser celandine is becoming dominant and smothering native ephemerals; he urged planning and shading strategies to outcompete the invasive.

Jeff pointed to Windsor Trail in Gladwin as an example where the invasive lesser celandine is spreading rapidly and replacing spring ephemerals such as trout lilies and trilliums.

"It's an incredibly invasive plant," Jeff said, describing how hillsides will be covered in a few weeks and how native ephemeral species are being smothered. He proposed design strategies that emphasize outcompeting and shading lesser celandine to protect native understory plants.

He recommended applying landscape planning principles at both the private-property and public-park level to reduce dominance of invasive species and preserve seasonal wildflower displays.