Banksia micrantha is a species of small shrub that is endemic to the south-west of Western Australia.

The specific epithet (micrantha) is from ancient Greek words meaning "small" and "flower".

[5]: 426 A 1996 cladistic analysis of Banksia by Kevin Thiele and Pauline Ladiges confirmed B. micrantha's placement in series Abietinae alongside B. sphaerocarpa, finding B. micrantha to be more closely related to B. sphaerocarpa var.

As a result, this last variety was upgraded to species rank as B. dolichostyla, and the four taxa were placed with B. grossa in a new subseries of Abietinae, Banksia subser.

[3][5] Banksia micrantha is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.