Arrived in Brisbane, Queensland, in 1864 to join his brother John O'Shanesy in a nursery/orchard business in Rockhampton (1864-1870) and Kabra (1870-). The two brothers (but particularly Patrick) were regular correspondents of F.Mueller, and collected widely in the Rockhampton district. Their collections are in MEL.
Extracted from: A.E.Orchard (1999) A History of Systematic Botany in Australia, in Flora of Australia Vol.1, 2nd ed., ABRS. [consult for source references]