Clematicissus opaca, called Small-leaf Grape, Pepper Vine, Small-leaved Water Vine, Yaloone and Wappo Wappo is a small vine endemic to Australia. Pepper vine is naturally found in rocky locales in monsoon forest, littoral rainforest and open forest, and is occasionally grown as a garden plant. The plant is primarily restricted to coastal and sub-coastal regions, although it does occur inland, west of the Great Dividing Range, in central New South Wales.