A lemon button fern, also known as a fishbone fern or lemon fern, is a small sword fern that grows on the West Coast and in most of the American South. Lemon ferns are popular houseplants because they require little care and emit a pleasant lemon scent.
Lemon button ferns have rounded, yellow-tinged fronds that, together with the citrus aroma, inspired the plant's name. They grow to about a foot in height and a foot and a half in width indoors. Lemon ferns need a small or medium-sized container, high humidity and medium to bright light. They thrive in terrariums and do well near the sea.