A 20th-century system of plant taxonomy, the Reveal system (see also the Thorne & Reveal system) of plant classification was drawn up by the American botanist James Reveal (1941-2015). The system was published online in 1997 in ten parts as lecture notes comparing the major systems in use at that time. Subsequently, Reveal became an author with the consensus Angiosperm Phylogeny Group (APG) on the APG II 2003 and APG III 2009 processes. Although this largely supplanted the earlier and competing systems, he collaborated with Robert Thorne on his system (2007), and subsequently continued to develop his own system.
1997 system
division Magnoliophyta [= angiosperms]
class Magnoliopsida
subclass Magnoliidae
class Piperopsida
subclass Piperidae
subclass Nymphaeidae
subclass Nelumbonidae
class Liliopsida [= monocots]
subclass Triurididae
subclass Aridae
subclass Liliidae
subclass Arecidae
subclass Commelinidae
subclass Zingiberidae
class Ranunculopsida
subclass Ranunculidae
class Rosopsida
subclass Caryophyllidae
subclass Hamamelididae
subclass Dilleniidae
subclass Rosidae
subclass Cornidae
subclass Lamiidae
subclass Asteridae
In more detail: