Durif 4.91 as approved grape varieties for American wines, but they are not listed as synonyms. This means that U.S. producers can produce Durif wine, but not label it as Petite Sirah, and vice versa. The ATF proposed that they be recognised as synonyms in "Notice of Proposed Rulemaking No. 941", published in the Federal Register on 10 April 2002, but a decision on RIN 1513–AA32 (formerly RIN 1512-AC65) appears to be postponed indefinitely, probably because the new regulation is tied up in the trade dispute that would see the TTB recognise Primitivo as a synonym for Zinfandel. While not one
Peloursin Rif" (later Durif) by ampelographer Victor Pulliat in 1868. Durif later made its way to California where it was eventually named Petite Sirah. In the late 20th century University of California, Davis researchers led by Dr. Carole Meredith discovered that some of the California plantings of Petite Sirah were, in fact Peloursin, and that Peloursin had a parent-offspring relationship with Durif that likely sprung from a crossing with Syrah. Peloursin is a vigorous grapevine capable of producing high yields and excessive foliage if not kept in check with winter pruning and summertime leaf pulling. The variety tends to be a