SWALLOWWORT
celandine, greater celandine, swallowwort, swallow wort, Chelidonium majus
(noun) perennial herb with branched woody stock and bright yellow flowers
Source: WordNet® 3.1
Etymology
Noun
swallowwort (countable and uncountable, plural swallowworts)
Alternative form of swallow-wort
Source: Wiktionary
Swal"low*wort`, n. (Bot.)
(a) See Celandine.
(b) A poisonous plant (Vincetoxicum officinale) of the Milkweed
family, at one time used in medicine; -- also called white
swallowwort. African swallowwort, a plant of the genus Stapelia.
Source: Webster’s Unabridged Dictionary 1913 Edition