Die Natürlichen Pflanzenfamilien (1887–1915) by Adolf Engler (1844–1930) and Karl Anton Prantl is a complete revision of plant families down to generic level and often even further. As such it forms part of the Engler system of plant taxonomy. Engler's starting point was that of Eichler who had been the first to use phylogenetic principles, and reflected the new post-Darwinian perspective, although Engler himself did not think that his was. His modified Eichler schema first appeared in 1886 in his Guide to Breslau Botanic Garden (of which he was the director). Die Natürlichen Pflanzenfamilien appeared in 23 volumes. An incomplete second edition was issued in 28 parts (1924-1980), although Engler had died in 1930. It is still considered one of the few true World Floras. First edition (1887–1915) The complete 23 volume work was published in four parts (Teil), together with supplements and indices. The volumes are arranged as follows: Teil (section) 1: Abt. 1, 1897; Myxothallophyta (Abt. I): Myxomycetes. Euthallophyta (Abt. II): Fungi (Eumycetes): Phycomycetes & Ascomycetes. Abt. 1*, 1907; Euthallophyta (Abt. II): Eumycetes: Lichenes. Abt. 1**, 1900; Euthallophyta (Abt. II): Eumycetes: Basidiomycetes & Fungi imperfecti. Abt. 1a, 1900; Euthallophyta (Abt. II): Schyzophyta & Flagellata. Abt. 1b, 1896; Euthallophyta (Abt. II): Peridiniales (Gymnodiniaceae, Prorocentraceae, Peridiniaceae) and Bacillariaceae. Abt. 2, 1897; Euthallophyta (Abt. II): Euphyceae. Abt. 3, Hälfte 1, 1909; Embryophyta zoidiogama (Abt. III): Hepaticae & Musci. Abt. 3, Hälfte 2, 1909; Embryophyta zoidiogama (Abt. III): Musci. Abt. 4 1902; Embryophyta asiphonogama (Abt. III): Pteridophyta. Teil 2: Abt. 1, 1889; Embroyophyta siphonogama (Abt. IV): Gymnospermae & Angiospermae (Monocotyledoneae: Thyphaceae etc.). Abt. 2, 1887; Monocotyledoneae: Gramineae & Cyperaceae. Abt. 3, 1889; Monocotyledoneae: Palmae etc. Abt. 4, 1888; Monocotyledoneae: Flagellariaceae etc. Abt. 5, 1888; Monocotyledoneae: Juncaceae etc. Abt. 6, 1889; Monocotyledoneae: Musaceae etc. Teil 3: Abt. 1, 1889; Dicotyledonae: Saururaceae etc. Abt. 1a, 1893; Dicotyledoneae: Polygonaceae etc. Abt. 1b, 1889; Dicotyledoneae: Phytolaccaceae etc. Abt. 2, 1891; Dicotyledoneae: Nymphaeaceae etc. Abt. 2a, 1891; Dicotyledoneae: Podostomataceae etc. Abt. 3. 1894; Dicotyledoneae: Rosaceae etc. Abt. 4, 1896; Dicotyledoneae: Geraniaceae etc. Abt. 5, 1896; Dicotyledoneae: Euphorbiaceae etc. Abt. 6, 1895; Dicotyledoneae: Elaeocarpaceae etc. Abt. 6a, 1894; Dicotyledoneae: Flacourtiaceae etc. (Index 6–8 p. 272) Abt. 7, 1893; Dicotyledoneae: Lythraceae etc. Abt. 8, 1894; Dicotyledoneae: Araliaceae etc. Teil 4: Abt. 1, 1897; Dicotyledoneae: Clethraceae etc. Abt. 2, 1895; Dicotyledoneae: Oleaceae etc. Abt. 3a, 1897; Dicotyledoneae: Convolvulaceae etc. Abt. 3b, 1895; Dicotyledoneae: Nolanaceae etc. Abt. 4, 1891; Dicotyledoneae: Rubiaceae