Nova plantarum genera iuxta Tournefortii methodum disposita.

Micheli provided descriptions of 1900 plants, including first published descriptions of about 1400. Among those were 900 fungi and lichens, accompanied by 73 plates. He included information on "the planting, origin and growth of fungi, mucors, and allied plants", and was the first to point out that fungi have reproductive bodies or spores. He observed that when spores were placed on slices of melon the same type of fungi were produced that the spores came from, and from this observation he noted that fungi did not arise from spontaneous generation. He also formulated a systematic classification system with keys for genera and species (Wikipedia). Digital facsimile from Google Books at this link.