The plant is primarily restricted to coastal and sub-coastal regions in Queensland[2] and New South Wales, although it does occur inland, west of the Great Dividing Range, in central New South Wales,[3][4] Clematicissus opaca is a relatively small vine, with stems of 6 metres or less.

[3][1] As with the closely related Cissus, the vines climb by means of tendrils produced opposite each leaf.

Minute flowers are produced on inflorescences that arise from branches of these tendrils.

Flowers are followed by globular, black fruit, approximately 15 mm in diameter.

[5][6] Clematicissus opaca produces tuberous roots, from which the plants can resprout following fire or grazing.