Two decades ago, Davis and some colleagues drove thousands of miles around the Southeastern U.S. looking for people growing unique collard greens. “We would pull up to a house and say, ‘Excuse me, I ...

Collard greens at the grocery store tend to be monotonous, making up rows and rows of wide leafy bundles. But in reality, there are dozens of varieties of the staple vegetable. The Jernigan Yellow ...

A dozen specimens might qualify as an impressive collection of Antarctic minerals or Amazonian minnows, but it’s a measly mess of collard greens. So, in the early 1990s, when Agricultural Research ...