Cassius V. Stevani / Chemistry Institute, University of Sao PauloThe luminous Mycena luxaeterna (eternal light) owes its name to lyrics from Mozart's requiem​Professor Dennis Desjardin is a well-named man. The San Francisco State mushroom specialist's handle, translated from French, literally means "of the garden." Earn a Ph.D in botany and people do point this out. "I thought of changing it to 'De La Merde' -- 'of the shit,'" says the professor. "You know, people always comment how mushrooms