Late 18th century; earliest use found in James Adair (fl. 1736–1775), trader and author in America. Alteration of purslane, probably by association with parsley.
Definition of pussley in US English:
pussley
nounˈpʌsli
North American
Purslane, Portulaca oleracea.
Origin
Late 18th century; earliest use found in James Adair (fl. 1736–1775), trader and author in America. Alteration of purslane, probably by association with parsley.