Cryptandra wilsonii is a shrub that typically grows to a height of 15–90 cm (5.9–35.4 in), its young stems covered with both star-shaped and straight hairs, the branchlets sometimes spiny.

The flowers are white and arranged in spike-like or head-like clusters of 2 to 6, with about 6 or 7 broadly egg-shaped floral bracts 1.2–1.6 mm (0.047–0.063 in) long at the base.

Flowering occurs from May to August, and the fruit is a schizocarp about 3 mm (0.12 in) long and densely covered with star-shaped hairs.

[2][3] Cryptandra wilsonii was first formally described in 1995 by Barbara Lynette Rye in the journal Nuytsia from specimens collected near Cape Riche Beach in 1974.

[2][3] Cryptandra wilsonii is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.