The scientific name of the "screw vegetable" is "grass stone Silkworm". It is named for its fleshy tubers that are spiral-shaped and resemble screws. It is also called "pagoda vegetable" or "ground ring". It is a perennial herb of the genus Stachycarpus in the Lamiaceae family and has edible, medicinal and ornamental values

Morphological characteristics

It grows to a height of 30 to 60 centimeters, with a quadrangular stem and opposite, ovate leaves. The underground tubers are white, with tender and crisp flesh, twisted in a spiral shape, 3 to 5 centimeters in length and about 1 centimeter in diameter, and have a smooth surface without fibers.

Nutritional components

Rich in carbohydrates, dietary fiber, vitamin C, potassium, calcium, phosphorus and other nutrients, it also contains various amino acids and volatile oils. It has a relatively low calorie content, with about 50-60 kilocalories per 100 grams of fresh product. It has a prominent dietary fiber content, which helps promote intestinal peristalsis.

Taste and flavor

The fresh meat is tender, crisp and juicy, with a sweet taste and a hint of vanilla flavor. It is a classic side dish to go with meals. After being cooked, it has a soft and glutinous texture, can absorb the flavor of the soup, and has a more intense aroma.