The Collaborative International Dictionary of English v.0.48:

Rocambole \Roc"am*bole\, n. [F.] [Written also rokambole.]
   (Bot.)
   A name of Allium Scorodoprasum and Allium Ascalonium, two
   kinds of garlic, the latter of which is also called
   shallot.
   [1913 Webster]