Sometimes Nature has an odd sense of humour. Take Stinging Nettle – Urtica urens here for example: at a glance she looks rather unassuming, even inconspicuous. Now, take a closer look: see those fine hairs? Well, if you’ve happened to brush past stinging nettle, you will know what I am talking about: those hairs sting as they come into contact with the skin – and not just a momentary prick but a lingering stinging and sometimes itchy and almost burning…