The term 'Small Plum' can refer to two different types of fruit: the DAMSON and the SLOE. The DAMSON is a small, oval-shaped plum with a deep purple skin and yellow flesh. It has a tart flavor and is often used in jams and jellies. The SLOE is a small, round, dark blue-black plum with a sweet flavor. It is commonly used to make liqueurs and wines. Both fruits are native to Europe and have been cultivated for centuries.