All types of citrus have seeds, although certain varieties are deemed seedless. Officially, according to the U.S. Department of Agriculture, a fruit can have up to six seeds and still be considered a seedless variety. That means most citrus fruit listed as seedless actually might contain a small number of seeds. However, this small amount is far fewer than the number of seeds found in a seeded variety. Just about every type of citrus fruit has seedless varieties.