In the November 2007 issue of Garden Design Magazine, plant guru Dan Hinckley wonders if he “is just another angry white gardener. You know the type. We are irate in general but don’t know exactly why or what for. We don’t like to look too closely at the basis of irritation for fear we are ourselves at the root.” I roared and snorted a bit out loud as I read his piece while crammed into a busy Amtrak train car, startling my seat mate who raised her head and rolled her eyes at me, as if waiting to see if I was drooling or sputtering uncontrollably. I felt my face redden a bit, nodded politely at her and slunk …