Shrub or small tree to 10 m high, in dry rainforest or in open forest, north from Ramornie on the Clarence River, NSW.
Leaves ovate to more or less circular, to 6 cm long, margins mostly entire, upper surface dark green; lower surface grey and finely pubescent with long and short hairs, petiole 3-8 mm long, hairy.
Male flowers in clusters of 3 or 4, female flowers solitary.
Photo: Robert Whyte
Petalostigma is a genus of plants under the family Picrodendraceae and the monogeneric subtribe Petalostigmatinae. It has 7 species found in New Guinea and Australia. In local medicine, pregnancy is said to be avoided by eating the fruit of the quinine bush (Petalostigma pubescens), which, as its name indicates, contains quinine. Plants of this species are also used for relieving pains.