707. More about castor bean allergy: Layton, L. L., Panzani, R., Greene, F. C., Green, T. W. & Smith, J. D. (1963). Castor bean allergy as cross-reactive hypersensitivity to the spurges (Euphorbiaceae): Absence of reaction to chlorogenic acid in primary allergy to castor beans. Int. Arch. Allergy, N.Y. 23, 225