1More fully "Port Jackson shark". Any of several small bullhead sharks of the family Heterodontidae found in shallow south Australian waters; especially Heterodontus portusjacksoni, which is light brown with black markings.
2South African More fully "Port Jackson willow". Either of two shrubby acacias, Acacia cyanophylla and A. longifolia, introduced to South Africa from Australia in 1847.
3More fully "Port Jackson fig", "Port Jackson fig tree". A shrubby fig tree, Ficus rubiginosa (family Moraceae), native to New South Wales.
Late 18th century; earliest use found in Arthur Phillip (1738–1814), colonial governor and naval officer. From Port Jackson, the name of the harbour of Sydney, Australia.