Clematis petriei is an evergreen climber that scrambles over rocks, shrubs or small trees. The branches are slender; the leaves are in threes, or pairs of threes. The flowers are small (male flowers up to 1.75 in (4 cm) in diameter), yellow-green and highly scented. Hardy in the UK.
Clematis petriei is a native of the South Island of New Zealand, where it occurs to the east of the Southern Alps, in valleys at altitudes of 1,500–3,500 ft (500–1,100 m). The male and female flowers occur in separate plants.