Guichenotia quasicalva is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia.

The petal-like sepals are pink, joined at the base and glabrous inside, the outer surface covered with scattered, star-shaped hairs.

[4] The specific epithet (quasicalva) means "almost bald", referring to the sparse covering of hairs on the stems, leaves and sepals.

[3][5] This species of guichenotia grows in wet-wet places and near creeks in dense shrubland and open mallee in three populations near Eneabba in the Avon Wheatbelt and Geraldton Sandplains bioregions of south-western Western Australia.

[2][3] Guichenotia quasicalva is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[2] meaning that it is poorly known and from only one or a few locations.