Acacia melanoxolon

Acacia melanoxylon R.Br. Mimosaceae. Australian Blackwood. Tree. Distribution: Eastern Australia. Tree. Invasive weed in South Africa, Portugal, California. Local uses: analgesic. Causes allergic contact dermatitis due to 2,6,-dimethoxybenzoquinone. Pinnate leaves of young plant drop off and phylloclades are formed instead. Photographed in the Medicinal Garden of the Royal College of Physicians, London.