Indigo (IMAGE) Donald Danforth Plant Science Center Caption Indigo crop, Persicaria tinctoria, with nearly a 3 billion base pair genome, growing in Stony Creek Colors fields. Credit Donald Danforth Plant Science Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.