Eichler system

A system of plant taxonomy, the Eichler system was the first phylogenetic (phyletic) or evolutionary system. It was developed by August W. Eichler (1839–1887), initially in his "Blüthendiagramme" (1875–1878) and then in successive editions of his "Syllabus" (1876–1890). After his death his colleague Adolf Engler (1844–1930) continued its development, and it became widely accepted.
The system was based on dividing the plant kingdom into those plants with concealed reproductive organs (non-floral), the (Cryptogamae, = hidden reproduction) and those with visible reproductive organs (floral), the (Phanerogamae, = visible reproduction). Moreover, Eichler was the first taxonomist to separate the Phanerogamae into Angiosperms and Gymnosperms and the former into Monocotyledonae and Dicotyledonae. His primary ranks were Divisions ("Abtheilung"), followed by orders ("Reihe").
"Blüthendiagramme" (1875–1878).
Volume I (1875).
Contents pp. VI–VIII<br>
Synopsis:
Volume II (1878).
Contents pp. V–VIII<br>
Synopsis:
"Syllabus" (Fourth edition 1886).
The system (here taken from the 4th edition of the "Syllabus", 1886) divides plants into divisions, classes and groups. Groups were further divided into orders.
Outline: p. 6. Page numbers refer to text