S. accedens is found around and northeast of Katherine in the Northern Territory of Australia.

It is an erect annual plant that grows from 4 to 15 cm tall.

Obovate leaves, about 4-10 per plant, form a basal rosette.

This species generally has one to two scapes and cymose inflorescences that are 4–15 cm long.

Its typical habitat is a shallow, sandy soil on a sandstone plateau.