Adenanthos glabrescens is a species of small shrub endemic to the Ravensthorpe area in southwest Western Australia.

Nelson based the species on a type specimen collected by himself from a sand ridge on the western edge of Lake King in 1973, giving it the specific epithet glabrescens, from the botanical term "glabrescent", meaning "losing hairs"; this is a reference to the leaf indumentum, which, unlike that of A. dobsonii, does not persist.

[1] Nelson followed George Bentham in dividing Adenanthos into two sections, placing A. glabrescens into A. sect.

[1] However Nelson discarded his own subsections in his 1995 treatment of Adenanthos for the Flora of Australia series of monographs.

[2] Two subspecies were recognised: The placement and circumscription of A. glabrescens in Nelson's arrangement of Adenanthos may be summarised as follows:[2] The species is most closely related to A. dobsonii.