Guardian: Ask the average person to name a living fossil, the chances are they will think of the coelacanth, or perhaps horseshoe crabs. However, plant examples of living fossils are all around us, surviving from long before the rise of todays dominant plants. The flowering plants, or angiosperms, are the basis of our food chain and include grasses and broad-leaved trees. But seed plants such as conifers and cycads, and even ancient spore producers such as ferns and clubmosses, continue to earn a living in...