Sentence:  Of the several species of "Gyromitra" that might be encountered in Alaska, two are especially important for morel hunters to learn: "Gyromitra esculenta" ssp. "lato", the beefsteak false morel, and "G. infula" ssp. "lato", the <WSD>elfin saddle</WSD>. 
Meaning of the word marked with <WSD> tags:  The ascomycete "Gyromitra infula", which similarly resembles a saddle.