430 THE HOME, FARM AND BUSINESS CYCLOPAEDIA. 



Sub-class II. CALTCIFLOR^E. Flowers usually dichlamy- 

 deous, petals either separate or united, stamens either 

 perigynous or epigynous. This sub-class has two sub- 

 divisions 



1. Polypetalce or Dialypetalce in which the petals 



are separate. 



2. Monopetalce or Gamopetalce in which the petals 



are united. 



Sub-class III. COROLLI FLORAE Flowers dichlamydeous, pe- 

 tals united, corolla hypogynous. 



Sub-class IV. MONOCHLAMYD^E or APATAL.E flowers either 

 with a calyx only or achlamydeous. In this sub-class 

 there are two sub-divisions 



1. Angiospermce in which the ovules are contained 



in a pericarp, and are fertilized by the action of 

 the pollen on the stigma. 



2. Gymnospermce in which the ovules are not con- 



tained in a true pericarp, and are fertilized by 

 the direct action of the pollen without the inter- 

 vention of a stigma, and the embryo is poly- 

 cotyledonous. 



CLASS II. MONOCOTYLEDONES, ENDOGEN^E, or AMPHIBRYA, 

 in which spiral vessels are present ; the stem is endogen- 

 nous ; stomata occur ; the venation is usually parallel, 

 sometimes slightly reticulated ; the flowers have stamens 

 and pistils and the symmetry is ternary ; the ovules are 

 contained in an ovary ; the embryo is monocotyledonous. 

 Under this C ass are included three Sub-classes: 

 Sub-class I. DICTYOGEN.E plants with reticulated venation 

 in their leaves, which usually disarticulate with the 

 stem ; woody bundles of rhizome in wedges. 

 Sub-class II. PETALOIDE.E, or FLORIDA in which the 

 leaves are parallel- veined ; the flowers usually consist 

 either of a coloured perianth or of whorled scales. 

 This sub-cless is divided into 



1. EpigynoB in which the Perianth is adherent, the 

 ovary is inferior, and each flower has usually 

 stamens and pistil. 



