Thym Citron - Lemon thyme. The herbs looks similar to garden or cultivated thyme, but its leaves have a strong lemon scent. That lemon scent is accompanied by a lemon flavor. I have included lemon thyme in this post as it may prevent someone from ordering a dish expecting thyme and ending up with an enjoyable but unexpected lemon accented dish. In the French kitchen lemon thyme will be added to dishes that want that lemon accent, especially fish dishes and desserts.
Filet de Sandre Roti, Beurre Blanc au Thym-Citron - Roasted pike-perch, the fish, served with a white butter sauce flavored with the lemon lime herb.
The importance of thyme in French cuisine
France's Butter Sauces 1. The Three Most Important Butter Sauces on French Menus.