Black cumin seeds. They should be fried before using for seasoning, when they impart a nutty flavour.
Black peppercorns, the fruit of a perennial vine with large leaves and white flowers. Green peppercorns are the unripe fruits picked early and pickled. Black peppercorns are picked just before they ripen and white peppercorns are the ripe, black peppercorns with the black skin flaked off. They are best kept whole and ground when required. Historically, pepper was one of the world's most important spices. Columbus sailed West, not East, in search of pepper in the East Indies. Instead he found the Americas and allspice.
Galangal. The rhizome of a plant of the ginger family, although it is smaller and more shrivelled. It has more translucent, flesh-coloured skin than the rhizome of ginger. It is peeled and grated or thinly sliced and used in the same way that fresh ginger is used, but has a slightly more complex flavour reminiscent of camphor. Greater galangal resembles a cross between ginger and pepper; lesser galangal is more pungent, with cardamom and eucalyptus flavours, whilst kempferia is the strongest.
Galangal. The rhizome of a plant of the ginger family, although it is smaller and more shrivelled. It has more translucent, flesh-coloured skin than the rhizome of ginger. It is peeled and grated or thinly sliced and used in the same way that fresh ginger is used, but has a slightly more complex flavour reminiscent of camphor. Greater galangal resembles a cross between ginger and pepper; lesser galangal is more pungent, with cardamom and eucalyptus flavours, whilst kempferia is the strongest.