Systematic position Bentham and Hooker placed it in the sub-class Gamopetalae,the series Bicarpellate and Cohort Gentianales . According to Engler it belongs to the sub-class Metachlymadeae, the sub-order Gentianineae under the order Controtae.Hutchinson places it under the order Apocynales of the Phylum Lignosae. Distribution The family contains about 300 genera …

Systematic position According to Bentham and Hooker it belongs to the series Microspermae. Engler places it under the order Microspermae.Hutchinson considers it as belonging to the order Orchidales of the divison Corolliferae. Distribution The family is large and is consisting of over 400 genera and more than 10,ooo species distributed …

Systematic position Bentham and Hooker places this family under the series Glumaceae of the Monocotyledons. According to the Engler it belongs to the order Glumiflorae. Hutchinson places it under the order Graminales belonging to the division Glumiflorae. Distribution The members of this family is cosmopolitan and grow on almost all …