As much as I like watermelon, I'll go with Wolfberry as I hadn't heard of it.
I didn't know Goji = Wolfberry.
Yipes. And it is in the nightshade family.
Lucky for me that you did go with Wolfberry.
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X is for XIGUA. (Pronounced She-Gwah)
Xigua is the Chinese name for watermelon.

...........................XIGUA................................