Published December 1, 2004The European flat oyster (Ostrea edulis), as its name implies, is native to Europe but is now cultivated on both North American coasts as well. This variety has a rounder shell than other types and is popular among half-shell enthusiasts. Here are two European flat oysters, one shell-side up and one open, resting on a mound of salt. Photograph, by Romulo Yanes, from the December 2004 Gourmet.Photo licensed from the Condé Nast Collection, home of The New Yorker, Vogue, Vanity Fair and other popular brands. Find this and other artwork at the Condé Nast Collection.