Lotus root is the crisp, edible rhizome of the sacred lotus, Nelumbo nucifera, an aquatic perennial that roots in pond and paddy mud and lifts round leaves and pink-white flowers above the water. Harvested from the muck as a chain of plump, sausage-link segments, it is prized as much for its looks as its eat: a clean cross-section reveals a lacy ring of hollow air channels, so each pale slice opens like a flower. Mild, faintly sweet and starchy, it holds a distinctive snap-then-crunch even after long cooking — stir-fried, braised in soups, simmered, pickled, candied, or deep-fried into chips.