Noun
Any of various plants:
Corydalis flavula (yellow harlequin)
Dicentra canadensis (squirrel corn, turkey corn)
Dicentra cucullaria (Dutchman's breeches)
Capnoides sempervirens (rock harlequin)
Aletris species (crow corn)
Lobelia inflata (Indian tobacco)
Source: en.wiktionary.org