1, longbeards need to blanch, you need to wash thoroughly with water. Longbeard (scientific name: AsparagusschoberioidesKunth) is a lily family, asparagus genus of erect herbaceous plants, up to 1 meter high. The root is slender, and the branches are sometimes very narrowly winged. Leafy branches narrowly striped, falcate, base subacute-triangular, distally flattened, scale-like leaves sublanceolate, flowers axillary, yellowish-green; pedicels very short, andromonoecious: female and male flowers subequal in size. Berries red when ripe, flowering in May-June, fruiting in August-September.

2. Distributed in China in Heilongjiang, Jilin, Liaoning, Hebei, Henan, Shandong, Shanxi, Shaanxi, and Gansu. Also distributed in Japan, Korea and Siberia, Russia. It grows on grassy slopes or under forests at an altitude of 400-2300 meters.

3. Rhizomes and roots are often mixed in Henan as the traditional Chinese medicine Baiqian.