What is the name of the pickle that looks like a screw?

Baotanical or manna seed, formerly known as the grass stoneworm, also known as the "ground ring". It is a perennial rooted plant of the family Labiatae. Underground rhizomes present spiral, crisp and tender without fiber, can make pickles. This product is a native of China, distributed in various places, cultivated in low wetlands near water. The stems, leaves and roots are used medicinally.

Botanical perennial, 30-120 cm tall, with dense fibrous roots and most transverse rhizomes in several nodes at the base of the stem; rhizomes white, with scalelike leaves and fibrous roots in the nodes, and a rosary-shaped or spiro-lion-shaped plump tuber at the top.

Distribution and value of Pagoda Cabbage:

Pagoda Cabbage is produced in Liaoning, Hebei, Shandong, Shanxi, Henan, Shaanxi, Gansu, Qinghai, Sichuan, Yunnan, Guangxi, Guangdong, Hunan, Jiangxi, Jiangsu and other provinces and districts, originating in China, wild in North China and Northwest China Provinces and districts, and the rest of the world are more cultivated; it is born in the humid land and the place of stagnant water, and the altitude can reach 3200 meters. Altitude up to 3200 meters. It is widely cultivated in Europe, Japan, and North America. The type was taken from Japan.

The underground fat tubers of Pagoda Cabbage are used for food, with a rare shape, crisp and tender without fiber, most suitable for pickles or pickles. In Guizhou, the whole herb is used as medicine to treat pneumonia and wind-heat colds.

The above content reference? Baidu Encyclopedia - Pagoda Cabbage