Shasta this, Shasta that

I was browsing through a World Book Encyclopedia as I love to do, (volume D), when I noticed a vaguely odd thing. The article on "dam" was illustrated with a photo of the Shasta Dam, California. Two pages later the article on "daisy" was illustrated with a photo of the shasta daisy (Leucanthemum x superbum) a hybrid originated by the famous horticulturist Luther Burbank. I confidently expected to find also the shasta dolphin, shasta duck and the beautiful though sadly extinct shasta dodo. But I didn't.