Catapodium marinum, the sea fern grass, is a species of annual herb in the family Poaceae. They have a self-supporting growth form and simple, broad leaves. Individuals can grow to 22 cm tall.

Poaceae, also called Gramineae, is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as true grasses. It includes the cereal grasses, bamboos, the grasses of nat