Tinker's Weed (Triosteum perfoliatum, erroneously called Tinkar's-root), the Fever-weed, with purgative and emetic properties, so called after an 18th-century New England doctor.
Tinker's Weed
Chambers's Encyclopaedia, Volume 10: Swastika to Zyrianovsk and Index, p. 217
Source scan(s): p. 0236