Whar are lychees and dragon fruit. They must not be common in the US. The fruit salad looks divine.
Lychees (Litchi chinensis): The Chinese tree (of the soapberry family) bears this small rounded fruit with sweet white scented flesh, a large central stone and a thin rough skin. They are odd but delicious! You remove the skin and stone to eat only the flesh. Dragon fruit (Pitaya): This fruit is good for you but the taste can be rather bland (unless mixed with other fruit). It has a wonderful looking skin - pink & lime green. It's a kind of cross between melon and kiwi in texture. I first tried it in Thailand as part of a fruit salad breakfast: I buy it now as it reminds me of that time.
P.S. Thank you - it was a delicious fruit salad, and I just love freshly cut, juicy pineapple ... mmmmm!