Bauhinia species; common name “Orchid tree,” though of course it's not an orchid.
The genus apparently produces beautiful flowers, but because this tree is in a greenhouse, it's constantly being pruned. As a result, it's produced exactly one flower according to the Greenhouse staff.
Retired economics professor (“dismal scientist”). Married 40+ years to the love of my life; we have two grown daughters, both married, two granddaughters and a...