Banksia undata, commonly known as urchin dryandra,[2] is a species of shrub that is endemic to the southwest of Western Australia.

Flowering occurs from July to October up to eight egg-shaped to elliptical follicles, 12–15 mm (0.47–0.59 in) long form in each head.

[2][3] This species was first formally described in 1848 by Swiss botanist Carl Meissner who gave it the name Dryandra praemorsa and published the description in Lehmann's Plantae Preissianae from specimens collected by James Drummond near the Swan River.

[4][5] In 1996, Alex George describe two varieties of D. praemorsa: In 2007 Austin Mast and Kevin Thiele transferred all dryandras to the genus Banksia.

[11] Banksia undata and its two varieties are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.