Ravindran, P.N.2014-07-082014-07-082007-02Cytologia 1979 v. 44 p.391-396http://hdl.handle.net/123456789/3860Vanilla planifolia (Andrews) (Syn. V. fragrans (Salisb.) Ames.) is the source of commercial vanillin, one of the important spices in use. Inspite of its economic importance very little is known about this plant. During the course of a study of pollen biology and cytology some interesting observations were made on the nuclear behaviour in the ungerminated-sterile-pollen grains of Vanilla. The present paper deals with this nuclear division and chromosome behaviour.enArticle