Engler system put monocotyledon before dicotyledon, and put the petal plants into one group, which is considered as an evolutionary group of plants. The catkin plant is regarded as the most primitive group of dicotyledon, andMagnoliales、RanunculaceaeAre considered to be more evolved groupsLeguminalesClassified asrosales Many modern taxonomists disagree with these views.
Engler's system has been revised several times, and was published in 1964《Flora》In the twelfth edition, dicotyledons have been placed before monocotyledons.There are 62 orders and 344 families, including 48 orders and 290 families of dicotyledons and 14 orders and 54 families of monocotyledons.The angiosperm classification part of the textbook of medicinal botany adopts the revised Engler system, but some contents have changed.
