Introductio generalis in rem herbariam.

Rivinus (Bachmann) introduced the concept of classification of plants based upon the structure of the flower.  He also introduced the ORDER as a distinct rank of biological classification having its own distinctive name (and not just called a higher genus (genus summum)). Rivinus developed and explained his classification system in the following extensively illustrated treatises:

Ordo Plantarum qvae sunt Flore Irregulari Monopetalo. Lipsiae: Typis Christoph. Fleischeri, 1690.
Ordo Plantarum qvae sunt Flore Irregulari Tetrapetalo. Lipsiae: Typis Christoph. Fleischeri, 1691.
Ordo Plantarum qvae sunt Flore Irregulari Pentapetalo. Lipsiae: Typis Joh. Heinrici Richteri, 1699.



Digital facsimile from atena.beic.it at this link.