Northwestern Yucatan Plain with Low Tropical Deciduous Forest

Ladder brake fern spreading across Mérida

September 23, 2026

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fern was recorded at three locations in Mérida on September 6, 10, and 14.¹ This Asian fern has spread invasively across the globe and is classified as a noxious weed.¹ In tropical settings where it establishes, it can proliferate vigorously and be difficult to control due to underground reproduction structures.¹

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