It is an erect, compact shrub with hairy young branches, narrowly egg-shaped, elliptic or oblong leaves and purple flowers arranged in groups of 7 to 9.

Petals are usually absent, the staminodes narrowly triangular and 1.3 mm (0.051 in) long, and the filaments and anthers are yellow.

[2][3][4] In 1999, Carolyn F. Wilkins described Keraudrenia exastia in the journal Nuytsia from specimens collected on the Dampier Peninsula in 1995.

[3][5] In 2016, Wilkins and Barbara Ann Whitlock changed the name to Seringia exastia in Australian Systematic Botany.

[4] Seringia exastia is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.