Rubus is the genera in which the weedy blackberry is found. The above photo shows the similarity of fruit with this exotic weedy plant.
Rubus australis Bush lawyer tataramoa
The compound leaves has leaflets between 5-10 cm long and oval with a coarsely serrated margin. The prickles are reddish. The fruit is about 8mm in diameter, yellow-red.
Rubus schmidelioides Bush Lawyer
The compound leaf of Rubus schmidelioides is divided into usually 5 lanceolate leaflets that may be 5-12 cm long and toothed.
male flowers of Rubus cissoides
If you wish to learn more about native plants I suggest one of these natural history books from fishpond