"swallowworts" in the noun sense
1. blood flower, swallowwort, Asclepias curassavica
tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings a weed throughout the tropics
2. celandine, greater celandine, swallowwort, swallow wort, Chelidonium majus
perennial herb with branched woody stock and bright yellow flowers
Source: WordNet® (An amazing lexical database of English)
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