Coriander
Also known as Coriandrum sativum, coriander seed, cilantro, Koriander, kolendra, cilantro seco
In charcuterie, coriander almost always means the dried seed, not the leaf. The two come from one plant and taste nothing alike, and confusing them is the commonest error in reading a translated recipe.
Coriander is one plant, Coriandrum sativum, that yields two entirely different seasonings. The dried seed is warm, citrus-like and faintly sweet, with a nutty background when toasted. The fresh leaf, called cilantro in North America, is green, soapy to some palates and volatile. Charcuterie means the seed almost every time. Where a recipe genuinely wants the leaf it is a fresh sausage or a Mexican or Asian preparation, and the recipe will normally say so.
The seed is a backbone spice of northern and eastern European sausage making. It runs through the Polish kiełbasy, the German Bratwurst and Bockwurst families, the Baltic and Scandinavian traditions, and it is a standard partner to white pepper, nutmeg and mace in fine cooked emulsions. In the dry-cured world it appears in some Spanish and Portuguese chouriços and in a scattering of Italian salami, but it is not a Mediterranean signature.
What it does on the palate is soften. The aroma is dominated by linalool, which is the same alcohol that gives lavender and bergamot their character, and that citrus-floral note lifts a heavy pork mix without adding heat. It has a particular affinity with garlic and with marjoram, which is why the three appear together so often in Polish work, and it is one of the few spices that reads as sweet without any sugar being present.
The practical craft point is toasting. Coriander seed straight from the packet is mild and slightly grassy. The same seed dry-toasted in a pan until it smells of orange peel and then ground is a different spice, rounder and considerably stronger. Many traditional recipes assume toasting without saying so, which is one reason a faithfully followed formula can taste flat. Where a recipe specifies whole seed rather than ground, it usually wants the pop of texture on the tooth as well, and grinding it changes both the flavour and the eating.
Quantities are generous by spice standards. Coriander is forgiving in a way that nutmeg and clove are not, and traditional formulas commonly run 1 to 3 g per kilo of meat, occasionally higher in a heavily spiced Polish sausage. Ground coriander stales quickly, losing its citrus top note first and leaving a dusty background, so buy it whole where the grinder allows.