xxx ii Introduction. 



Perianth tubular, usually coloured, not hardened at the 



base. 

 Stamens borne on the segments of the perianth. 



Shrubs and trees . . . Proteacece, page 395 



Stamens not borne on the segments of the perianth. 

 Ovules erect. Evergreen or deciduous shrubs or 



trees with lepidote leaves . Elceagnaccce, p. 395 

 Ovules pendulous. Shrubs with a tough fibrous 



bark Thymelacea, p. 393 



Perianth short, not tubular or only slightly so. 



Leaves lepidote. Shrubs . . . Elceagnacea, p. 395 

 Leaves not lepidote. 



Perianth dry and coloured. Herbs Amaranthacea, p. 388 

 Perianth herbaceous or succulent Chenopodiacece, p. 388 

 Flowers -unisexual. Herbs or shrubs with scaly simple leaves and 



a membranous or baccate 1-seeded fruit . CJienopodiaccce, p. 388 

 3, Flowers with both calyx and corolla, the latter monopetalous. 1 

 Ovary superior. Flowers regular. 

 * Ovary 3- to 5-lobed. 

 Leaves usually scabrid. Inflorescence gyrate. Herbs or under- 



ehrubs Borraginacece, p. 319 



Leaves not scabrid. Inflorescence straight. Corolla plaited in 

 Aestivation. Trailing annuals with showy flowers resembling 



those of Convolvulus Nolanacea, p. 318 



** Ovary not lobed. 



Anthers opening by pores. Evergreen or deciduous shrubs with 



conspicuous flowers Ericea, p. 275 



Anthers opening by slits. 

 Carpels 4 or 5 or only 1. 



Stamens equal in number and opposite to the petals. Herbs 



Primulaccce, p. 371 



Stamens not opposite the petals if of the same number. 

 Carpels distinct ; seeds indefinite. Succulent herbs 



Grassulacea, p. 188 

 Carpels combined. 



^Estivation of corolla, plicate. Climbing, twining, or trail- 

 ing herbs with brightly coloured flowers Convolvidacea, p. 315 

 .^Estivation of corolla imbricated. Shrubs often with 



prickly evergreen leaves and small flowers llicinca, p. 99 



Carpels usually three. 



Inflorescence gyrate. Herbs . . Hydrophyllacea, p. 314 



Inflorescence not gyrate. Herbs or shrubs Polemoniacete, p. 305 



Carpels only two. 

 Stamens two. 



Corolla valvate. Erect shrubs or trees : . Oleaccce, p. 291 

 Cprolla imbricate. More or less trailing or climbing 



shrubs with white or yellow flowers . . Jasmincce, p. 289 

 Stamens four or more. 



Inflorescence gyrate. Herbs . . . Hydrophyllacea, p. 314 



1 In some instances the petals are only very slightly united at the base. 



