The Newnes Plateau Banksia (Banksia conferta subsp. penicillata) is a plant only described in 1981 though collected in the 1970s. It was first described on the Newnes Plateau in the southernmost part of the Wollemi National Park

Wollemi National Park

Wollemi National Park is the second largest national park in New South Wales, and contains most of the largest wilderness area, the Wollemi Wilderness...

, though more recent collections have widened its distribution, with the northernmost occurrence upon Mt Monundilla.

It is the southern subspecies of Banksia conferta

Banksia conferta

The Glasshouse Banksia is a species of montane shrub or small tree in the plant genus Banksia. It occurs as distinct subspecies in two widely separated locations: B. conferta subsp. conferta in southern Queensland on the Lamington Plateau and further north in the Glass House Mountains; and...

, though has been considered a full species by some. It seems to share affinities with Banksia paludosa subsp. astrolux.