It is a long white-skinned cultivar with both foliar and tuber resistance to late blight. Bitter compounds tend to accumulate in immature tuber tissues of white and yellow yams. The term "tuber" is often used imprecisely and is sometimes applied to plants with rhizomes. Over watering may destroy this plant through tuber rot. Leaves sprout from growing points or floral trunks on top of the tuber. Their name derives from their resemblance to truffles, edible fungi of the genus "Tuber". The order also contains many geophytes (bulbs, corms, and various kinds of tuber). Eliminating infected foliage reduces the likelihood of tuber infection. Leaves and flowers sprout from growing points on the top of the tuber. The root tuber is typically planted close to the surface. JA is also responsible for tuber formation in potatoes and yams. These small to massive plants grow from a subterranean tuber. Ridging is often used to reduce tuber contamination by blight. The plant can quickly regenerate if a single tuber is left in place. Saplings grow from a drought and fire resistant tap-rooted tuber.