Phlegmariurus is a genus of tropical ferns known for their unique, elongated growth habit, resembling a mass of wiry, hanging branches. These plants often thrive in the canopies of moist forests, where their aerial form allows them to capture moisture and nutrients effectively from the air, rather than relying solely on soil. Distinctive for their dense, overlapping leaves, which form a chain-like appearance, phlegmariurus exhibits adaptations ideal for high-humidity environments.