Xanthosia peduncularis is a spreading perennial herb in the family Apiaceae and is endemic to the south of Western Australia.

Xanthosia peduncularis is a spreading perennial herb that typically grows to a height of about 15 cm (5.9 in).

[2][3] Xanthosia peduncularis was first formally described in 1867 by George Bentham in his Flora Australiensis from specimens collected by James Drummond.

[5] This species of xanthosia grows in gravelly sand in the Esperance Plains bioregion of southern Western Australia.

[3] Xanthosia peduncularis is listed as "Priority Three" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[3] meaning that it is poorly known and known from only a few locations but is not under imminent threat.