It should come as no surprise that southern Evia’s largest gorge is also one of its most important natural environments. Much of this has to do with the fact that the gorge is Ochi’s largest drainage basin, collecting the majority of water that flows down from its peaks. Rare tree varieties such as yew and whitebeam flourish here, alongside holly, oak, chestnut, hornbeam, plane heath, ash and olive trees. Arborea and briar bushes grow throughout Demosaris as well. Evia’s famed mountain tea (Sideritis euboica) grows in abundance here, and beautiful orchids such as dactylorhiza (Dactylorhiza saccifera) paint the gorge with a variety of colours.