O.Henry tells about a man starting to go to work, and his wife gives him a good-bye kiss that tastes of "Young Hyson".
I thought it might be a joke parodying some tea name. But on search I find it is a genuine blend name:

Green Tea: Young Hyson. From China, this is our most pungent green tea. Full-bodied,
with a long-lasting, slightly bold taste. Pale amber in the cup. ...
www.allannbroscoffee.com/product36.html - 2k - Cached