The flowers are hairy and white with a yellow-, orange- or red-tipped style, the pistil 7–10 mm (0.28–0.39 in) long.

Flowering occurs from May to November, and the fruit is a shaggy-hairy, oblong to elliptic follicle about 8 mm (0.31 in) long.

[2][3][4] Grevillea uncinulata was first formally described in 1904 by Ludwig Diels in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie from specimens collected near Tammin.

[7] This grevillea grows in heathy shrubland or shrubby woodland and is widespread from near Badgingarra to the Stirling Range and Ravensthorpe in the Avon Wheatbelt, Coolgardie, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee and Swan Coastal Plain bioregions of south-western Western Australia.

[2][3] Grevillea uncinulata is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.