EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this Form 8-K of our report dated December 19, 2000, included in the Exelixis, Inc. Form S-8 relating to the "Options Assumed by Exelixis, Inc. Originally Granted Under the Agritope, Inc. 1997 Stock Award Plan" and the previously filed Form S-8 Registration Statement File No. 333-35862. /s/ Arthur Andersen LLP Portland, Oregon December 19, 2000