i6o Plants and their Ways in SoiitJi Africa 



Group 3. — Incojnpletce . ' 

 Sub-class V. — Incomplete. 

 A. Perianth present. 



Flowers regular. Perianth tubular, its lobes 



imbricate in bud. Shrubs 

 Perianth more or less irregular, 4 -cleft or 

 4-parted, imbricate in bud. Trees or shrubs 

 Perianth 4-8-parted ; ovary inferior. Fruit a 



berry. Parasites on trees 

 Perianth 3-parted, becoming woody ; root 

 parasites ....... 



A A. Perianth absent. 



Flowers imperfect (sometimes with sepals). 



Fruit a 3-celled schizocarp. Plants usually 



milky ....... 



Flowers imperfect. Staminate flowers in 

 catkins. Trees . . . . . 



Sub-class VI. — Gymnosperms. 



Flowers monoecious or dioecious. Ovules not 

 enclosed within the ovary. Flowers in cones 



Thymele/e. 

 Proteace^e. 

 loranthacee. 

 Hydnoracee. 



EUPHORBIACEi^. 



Amentace^e. 

 Conifer.^.* 



MONOCOTYLEDONS. 

 Group i. — PetaJoidcd. 

 A. Ovary inferior. 



Stamens i, joined to the style ; ovary i -celled OrchidacE/*: 

 ,, 3 ; ovary 3-celled .... 



J> 5 ' J> 5> " • . . 



A A. Ovary superior. 

 B. Flowers perfect. 



Perianth coloured ; stamens 6 . 

 Calyx green ; corolla coloured ; anthers 

 differently formed ..... 



Perianth coloured ; ovary inferior or superior, 

 stamens 3-6 ...... 



BB. Flowers imperfect. 



Flowers dioecious. Perianth of 6, rarely 4 



glumes RESTlACEiE. 



Group 2. — Glujtiacecz. 

 Stem solid. Sheath of leaf not split, without a 



ligule Cyperace/E. 



Stem hollow. Leaf-sheath split. Ligule present GRAMiNACEiE. 



Iride.^. 



MUSACE/E. 

 AMARYLLIDACE/E. 



LiLIACEE. 



COMMELYNACEi^. 



HiEMODORACEE. 



^ Including Cycadacese and Gnetaceae. 



