The most important edible yams come from just a few species: D. rotundata (widely known as white Guinea yam), D. alata (known as water yam, winged yam or greater yam), D. cayenensis (yellow yam or yellow Guinea yam), D. esculenta (lesser yam, potato yam or Chinese yam), D. dumetorum (bitter yam or trifoliate yam), D. … Continue reading Yam