Apium prostratum, commonly known as sea celery, is a variable herb native to coastal Australia and New Zealand. The leaves are variable, with toothed leaflets, and a celery like aroma. The tiny white flowers occur in clusters. There are two varieties: * Apium prostratum var. prostratum – headland sea celery, squat with broad leaves and grows on coastal dunes and headlands. * Apium prostratum var. filiforme – mangrove sea celery, upright with fine leaves and grows in swamps. The subspecies Apium prostratum subsp. howense is endemic to Lord Howe Island.