Natural postcard from Lijiang, Yunnan, China

I’m not sure the scan here will do it any justice, but this postcard is actually a real leaf (I wonder what kind?). It was sent to me by two of my most memorable private students from their recent visit to 中国 云南省 丽江. I was so thrilled to receive this card, and I think back fondly on the time I spent with them in Hangzhou just over a year ago when they spent the day giving me a tour of their college town, introducing me to delicious restaurants, and dedicating their hard-earned time off to welcoming me with open arms. I hope I can return to China again some time soon, and that they can travel to the US again. Until then, I’ll be sending them a thank-you postcard. But where to find a postcard of comparable beauty and uniqueness?!