Pliny's "bee grapes" — uvae apianae, so called because their sweetness drew the bees. They were among the sweet, aromatic grapes of Roman Italy, used for honeyed wines, and their muscat-like scent has made them a perennial candidate for the ancestor of the Muscat family.
That link, though, is folk etymology, not evidence: "attractive to bees" describes many sweet grapes, and nothing ties the apianae by descent to today's Muscats. Like the other grapes named only by Rome's writers, the bee grapes are a vivid description without a verifiable identity — a reminder that the ancients recorded taste and habit far more faithfully than the vines themselves.