Purple corn is purple (black) corn family treasures, so purple corn also known as "black corn" because the particle shape of pearls, the "Black Pearl," said. It is about 1.5 meters height, maturity 100 days, there is a 1-3 female flower, usually 1-2 knot stick, just as grain, was crystal ivory, grew up had become pink, mature into a purple, dried into a purple, long stick about 250px, grain weight ...