Rubus cissoides, commonly called bush lawyer or tātarāmoa in te reo Māori, is a species of flowering plant in the family Rosaceae, endemic to New Zealand.

Plants of this species of are perennial scrambling vines with compound leaves with 3-5 leaflets each up to 15 cm long, reddish prickles on the branches, white flowers from September to November and red berries from December to April.

The conservation status of R. cissoides is Not Threatened, it is widespread on all three main islands of mainland New Zealand, and it has been used by Māori as food, medicines and construction materials.

[8][5] Rubus cissoides is the most common native species in New Zealand, and has sharply toothed leaflets that are long and narrow.

[9] It is found in lowland and montane habitats, often in forests, but also in scrub and wetland margins,[9] often in moist, sunny environments.

[12] Rubus cissoides is considered to be Not Threatened in the most recent assessment (2017–2018) under the New Zealand Threat Classification system for plants.

[14] The blackberry rust fungus Phragmidium violaceum, appears as black patches on the leaves and can cause mild infections in R.

[10] The fruits are eaten by birds and people, the branches can be used for making traps, and the crushed berries form a dye which is blue or purple in colour.