English: Hollowroot, birthwort.
Synonyms: Corydalis tuberosa, Corydalis bulbosa, Fumaria cava, Fumaria bulbosa, Pseudofumaria major, Capnoides cava.
Name: Greek korydalis, a crested lark; Korys means “helmet”, referring to the shape of the flower.
Dutch: Holwortel.
German: Hohlwurz.
Botany: Europe; bowl-shaped hollowed-out tuber; lightly shaded areas, beech forests; clay soil.
Chinese: Yan-hu-suo.
Content: protopine, bulbocapnine.