What's the name of the blue-purple floret that blooms in the ground in early spring (it blooms very early, when the hay just germinates)

Platycodon grandiflorum, a perennial herb of the genus Platycodon in Campanulaceae, has ovate or ovate-lanceolate leaves and dark blue or purplish white flowers, which can be used as ornamental flowers. Koreans eat wild vegetables; Its roots can be used as medicine, and have the functions of relieving cough, resolving phlegm, dispersing lung qi and expelling pus.