Persoonia sericea, commonly known as the silky geebung, is a plant in the family Proteaceae and is endemic to eastern Australia.

Persoonia sericea is an erect to spreading shrub with its leaves and young branches covered with soft, silky hairs.

The central style is surrounded by four yellow anthers which are also joined at the base with the tips rolled back, so that it resembles a cross when viewed end-on.

The type specimen was collected near the Lachlan River by Cunningham and the description was published in Supplementum primum Prodromi florae Novae Hollandiae.

[3] Silky geebung grows in woodland and forest north from Grenfell in New South Wales and in south-eastern Queensland.