Strychnos toxifera

from The Collaborative International Dictionary of English v.0.48

Curare \Cu*ra"re\ Curari \Cu*ra"ri\(k?-r?"r?), n. [Native name.
   Cf. {Wourall}.]
   A black resinoid extract prepared by the South American
   Indians from the bark of several species of {Strychnos}
   ({Strychnos toxifera}, etc.). It sometimes has little effect
   when taken internally, but is quickly fatal when introduced
   into the blood, and used by the Indians as an arrow poison.
   [Written also {urari}, {woorali}, {woorari}, etc.]
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Curarine \Cu"ra*rine\ (k?"r?-r?n or k?-r?"r?n; 104), n. (Chem.)
   A deadly alkaloid extracted from the curare poison and from
   the {Strychnos toxifera}. It is obtained in crystalline
   colorless salts.
   [1913 Webster]