xxx Introduction. 



Sepals two. Herbs . . Portulacca, page 74 

 Sepals more than two. 

 Stamens hypogynous. 



Seeds plumose. Shrubs with minute imbri- 

 cated persistent leaves and small spicate 

 flowers . ... Tamariscinece, p. 75 

 Seeds naked. Shrubs or trees with alternate 



leaves and inconspicuous flowers Pittosporcce, p. 60 

 Stamens perigynous. Shrubs or trees with 

 evergreen or deciduous simple leaves and 

 inconspicuous flowers .-.", Celastrinece, p. 100 

 Calyx valvate or open. 



Stamens if equal in number to the petals, opposite to 



them. Shrubs with inconspicuous flowers Ehamnea, p. 101 

 Stamens if equal in number to the petals, alternate 

 with them. Herbs having a tubular often 

 coloured calyx and perigynous stamens Lythrariece, p. 195 

 2. Flowers apetalous. 



A. Flowers destitute of both calyx and corolla, 

 f Leaves stipulate. 



Ovules numerous. Seeds plumose. Deciduous trees and shrubs 

 with alternate deciduous simple leaves and dioecious flowers 

 arranged in catkins ..... Salicinea, p. 416 



Ovules solitary or very few. 

 Flowers unisexual. 



Carpels solitary. Ovule erect. Deciduous shrubs covered 



with resinous glands. Flowers in catkins Myricacea;, p. 413 



Carpels solitary. Ovule pendulous. Deciduous trees with 

 large palmately - lobed leaves. Flowers in dense 



spherical heads Platanacece, p. 405 



Carpels three. Shrubs or herbs with small clustered often 



involucrate flowers . . . Euphorbiacece, p. 399 



ft Leaves exstipulate. 



Shrubs with hermaphrodite spicate flowers, simple leaves, and 



jointed stems Piperacece, p. 399 



Shrubs or trees with small clustered flowers and opposite leaves 



Oleacees, p. 291 

 Shrubs with simple deciduous leaves, usually covered with 



resinous vesicles Myricacea, p. 413 



B. Flowers with only one envelope, termed perianth or calyx. 

 Ovary inferior or partially so. 



f Leaves stipulate. 



Flowers hermaphrodite. Herbs or climbing shrubs with simple 

 leaves and an irregular or regular campanulate or tubular 

 perianth Aristolochiacea, p. 397 



Flowers unisexual. Fruit in a eupule or involucre. Deciduous 

 or evergreen trees or shrubs with alternate leaves and 

 flowers usually in catkins . . . Cupuliferce, p. 408 



Flowers unisexual. Fruit naked, many-seeded, usually winged. 



Herbs , Begoniac-w, p. 207 



ft Leaves exstipulate. 



Flowers unisexual, amentaceous. 



