MEXICO CITY — Even though it's illegal, bars of acitrón are stacked in nearly every stall at the Merced market in Mexico City. They look like lemon bars. But they're pieces of barrel cactus that have ...

Fowler doesn’t waste time stopping for meals on his cactus expeditions. As dawn broke, a Grateful Dead album played quietly in the background and the men gossiped about fellow succulent lovers who’d ...