Plantwatch: Australia's giant stinging trees - 35m tall with a poison that can last for months

Scientists are hoping that research into Dendrocnide excelsa could lead to new painkillersIt sounds like something out of The Day of the Triffids: a stinging nettle the size of a large tree, with a sting so vicious it inflicts excruciating pain that can last for days, weeks or even months. But this is no science fiction, these are the stinging trees of Australia.Dendrocnide excelsa can grow up to 35 metres tall in tropical rainforests in Queensland, one of a gang of six Dendrocnide tree or shrub species found in Australia. These thugs of the plant world belong to the same family as common stinging nettles, with leaves covered in similar tiny needle-like hairs that act like hypodermic syringes, injecting their poison at the slightest touch of the skin, although the poison is far more powerful than a nettle's. Related: Australia's stinging trees: if the snakes and spiders don't get you, the plants might | Irina Vetter, Edward Kalani Gilding and Thomas Durek Continue reading...