Siloxerus is a genus of Australian plants in the tribe Gnaphalieae within the family Asteraceae endemic to Australia. Plants in the genus usually have leaves in a rosette at the base of the plant or sessile stem leaves, and disc-like compounds heads of bisexual, tube-shaped yellowish flowers. The fruit is an oval, often purplish cypsela with a scaly white pappus.
The following species of Siloxerus are accepted by Plants of the World Online as of November 2025: