Isotoma scapigera, commonly known as long-scaped isotome, is a small herbaceous plant in the family Campanulaceae native to Western Australia.
The erect, annual herb typically grows to a height of 0.05to. It blooms between September and December, producing blue-purple flowers.
It is found in wet depressions, around salt lakes and on sand dunes in the Mid West, Wheatbelt, South West and Goldfields-Esperance regions of Western Australia where it grows in shallow sandy-clay soils.