Wild sweet potato, also known as mandiqing, is a woody evergreen vine. The whole wild sweet potato has milk, and its length is more than 10 meter. It is born on the ground, and it is easy to produce hairy adventitious roots when touching the ground, which looks like a giant centipede, so it is also called centipede. Branches with many branches, fast growth and strong climbing ability can cover about 2 square meters of ground by the winter of that year. The stems and vines of wild sweet potatoes are soft and tough, and the annual stems and vines can bear 30~40 kilograms of tension, which is a good raw material for weaving baskets and vines. The leaves are 2~6 cm long and 2~4 cm wide. They are emerald green and will not fall in winter. They are good feed for herbivores, especially rabbits, foreigners and geese. Flowers unisexual, clustered or solitary in leaf axils or branches. Wild sweet potato fruit is spherical, with a diameter of 1.5~2.5 cm. The young fruit is turquoise, reddish and sweet as honey.

In the fruit maturity (August ~ 65438+February), even if it is more than 20 meters away from wild sweet potatoes, it feels fragrant, so it is also called dixiang. Wild sweet potato is cold-resistant, drought-resistant, shade-resistant, barren-resistant and water-resistant. Even if they are planted in the cracks of barren sand or slate, they will flourish and be full of green; Whether it is a hot summer or a snowy winter, it spreads like a brocade all year round, and the green leaves are like shadows; Whether growing on a hill exposed to the scorching sun or under an ancient forest, the leaves are always green and full of vitality; Whether it is a depression or a dry mountain, everything can be happy and evergreen all the year round.

Wild sweet potatoes are suitable for greening in parks or places that are easy to be trampled by tourists, and can withstand the trampling of many tourists. Because of this tough and lush vine, wild sweet potatoes always grow crisscross, so it will naturally "weave" into a "giant fishing net", which can firmly "catch" loose soil and sand on the surface, plus the thick leaves "covering" for many years, which looks like a green carpet for a long time. This special effect of sand prevention and soil consolidation is incomparable to other plants, and it can be called a masterpiece of sand prevention and soil consolidation.

Wild sweet potato can also be used for fruit cultivation, which is suitable for orchard interplanting, making the traditional single-season orchard become a double-season orchard. It can also be used for hanging potted landscape fruits and viewing leaves. The flexible green stem vines are elegant and elegant, with the beautiful scenery of "thousands of strands of moss tapestries hanging down". To sum up, wild sweet potato is a multi-purpose plant with edible, medicinal, greening and ornamental functions.