Abstract: An attempt is made to elucide some pronounced changes in the classification ofLiliaceae sensu lato in the last 60 years. The changes in the classification of Liliaceae s. l. have to involve the classification of its related families. In order to understand the different treatments of it by Engler ＆ Prantl (1930), Hutchinson (1934), Dahlgren et al. (1985, embodies G. Dahlgren, 1989), Takhtajan (1987), and Thorne (1992), a concise table of approximate concordance of taxa (with tribe as a main basic unit) of the order Liliiflorae sensu Engler ＆ Prantl with those recogizied in the other four systems is given. The considerations and the taxonomic characters adopted by Hutchinson, who may be the first author to change drastically the classification of Liliaceae sensu lato, are more detailedly explained than those in Dahlgren et al. , Takhtajan, and Thorne's systems. Comments on the benefits of narrower and broader circumscription at family level are made. The present author does not agree with elevating all subfamilies or satellite groups to the rank of family if the segregated families remain the closest relatives without the change in systematic position. Different hypotheses of the origin of the monocotyledons proposed by Hutchinson, Takhtajan and Dahlgren et al. are also introduced. Although the opinion of Dahlgren et al. (1985) has not been accepted by many authors, their peculiar methodology is worth noting. On the basis of the distribution of character states common to the monoctyledons and the dicotyledons they postulate a hypothetical taxon. Then the derivation of an ancestral monocotyledon from this hypothetical taxon might only have involved a few steps. Such an ancestral monocotyledon does not exist, but the closest extant plant is perhaps Trichopus (Trichopodaceae, Dioscoreales). Certainly Tichopus is not a direct link between the monocotyledons and the dicotyledons, but it exhibits a number of features that are also found in Annonales (superodeer Magnolianae). Thus the Dioscoreales are favoured by them as the least derived monocotyledons. They place the Dioscoreales at the beginning of their system as the first order of the superorder Lilianae. The author gives some suggestions for investigations of Liliaceae s. l. in China today. Among them the extensive studies (in morphological, chromosomal and molecular aspects) of some selected groups, such as Lilium, Monocharis, Paris etc. , seems more realistic because they are distributed in N. Hemisphere.  It is easy to collect the materials.Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug.
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