This is “× Citrofortunella mitis” (family Rutaceae), a hybrid with many common names around that world. It’s native to China and is one of the cold-hardiest citrus. Alas, this is all I could muster “in the round,” or “circular” in the greenhouse today. I find it interesting that this fruit grows “up” from its stem underneath.
I did learn some things about my old version of Photoshop trying to draw all the additions to the image!
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...