圓羊齒 Sword fern tuber ladder fern (Nephrolepis cordifolia)
Growing beneath the crown of a non-native palm.
Outside of someone's garden
Tuber ladder fern, (Nephrolepis cordifolia) is a fern native to northern Australia and Asia. It has many common names including erect sword fern, narrow sword fern and ladder fern, fishbone fern, and herringbone fern. It is similar to the related fern Nephrolepis exaltata.