dried dioscorea opposita or chinese yam or chinese potato or cinnamon-vine or nagaimo

asia background biology blur botanic botanical botany cancer china chinese cinnamon closeup cough crohn cuisine cultivated dioscorea disease dried dry eaten edible flavor food garden gourmet health healthy herb herbal important ingredient interesting japanese language medicinal medicine nagaimo noodle nutrient nutrition opposita ornamental plant popular potato prevention product species thai traditional treatment tree tuber vine whooping yam