Find the oldest plant in the glasshouse and ask how it got there

Somewhere in your city's botanical glasshouse is one plant that's been there longer than anyone on the payroll — and the little brass label won't tell you which. A gardener will, and they'll usually throw in the arrival story unprompted: dug up where, shipped how, nursed back from what. Go find it, get the story, and take its portrait before you leave.