Melchior system

This is the named Melchior system, "a reference in all taxonomic courses", detailing the taxonomic system of the Angiospermae according to A. Engler's "Syllabus der Pflanzenfamilien" (1964), also known as "modified or updated" Engler system.
The collaborators in orders (and some families) were the following:
Angiospermae.
classis Dicotyledoneae.
subclassis Archychlamydeae.
ordo Thymelaeales.
Note: "Sonderothamnus" R.Dahlgren, 1968 is posterior to the publication of this work, and "Stylapterus" A.Juss. was included by G. Bentham & J.D. Hooker in "Penaea".
Note: the classification of Thymelaeaceae was based on Domke 1934.