Webster’s Revised Unabridged Dictionary · 1913
Swallowwort
Swal′low·wort′ (·wûrt′), 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.