In medieval Latin, a florilegium (plural florilegia) was a compilation of excerpts or sententia from other writings and is an offshoot of the commonplacing tradition. The word is from the Latin flos (flower) and legere (to gather): literally a gathering of flowers, or collection of fine extracts from the body of a larger work. It was adapted from the Greek anthologia (ἀνθολογία) "anthology", with the same etymological meaning.
Later the word was used for various forms of compilation to do with flowers or plants, such as Banks' Florilegium, or just for published collections of various sorts.