Introduction. xxxi 



Leaves simple, alternate, usually furnished with resinous 



glands Myricacete, page 413 



Leaves simple, opposite. Evergreen shrub . . Garry a, p. 217 

 Leaves compound. Deciduous trees, often having a balsamic 



juice Juglandacea , p. 406 



Flowers unisexual, not amentaceous. Tender herbs having 



ornamental fruits ..... Cucurbitaceee, p. 206 

 Flowers hermaphrodite or polygamous. 



Leaves with transparent dots. Evergreen shrubs or trees 



with numerous stamens ' . . * Myrtaccce, p. 193 



Leaves without dots. 



Ovary 3- to 6-celled, many-seeded. Herbs or climbing 

 shrubs with an irregular or campanulate perianth 



Aristolochiacca, p. 397 

 Ovary 1-celled, 1 -seeded. Herbs or shrubs usually having 



scaly leaves . . . . . Chenopodiacea, p. 388 

 Ovary superior, 

 f Leaves stipulate. 



Flowers hermaphrodite. 



Carpels more than one, combined into a solid pistil. 



Perianth coloured, valvate ; stamens monadelphous, hypo- 



gynous. A shrub .... Fremontia, p. 84 

 Perianth membranous. Fruit winged or drupaceous. Trees 



with simple alternate deciduous leaves . Ulmaccee, p. 403 

 Carpels solitary or quite separate. 

 Styles terminal, three to each ovary. 



Herbs with sheathing, often fringed stipules Polygonaceee, p. 383 

 Herbs with simple stipules . . . Phytolaccacc^ p. 387 

 Flowers unisexual. 



Carpels more than one, combined into a solid pistil. 

 Flowers amentaceous. Deciduous trees with simple leaves 



Betulacpa, p. 414 



Flowers not amentaceous . . .'- . Euphorbiacea, p. 399 



Carpels solitary. 



Herbs with lobed leaves and exalbuminous seeds Cannabinacccs, p. 403 

 Trees or shrubs with large stipules . . . Moracca, p. 401 

 tf Leaves exstipulate. 

 Flowers hermaphrodite. 



Carpels more than one, combined into a solid pistil. 

 Perianth short, herbaceous. 



Embryo curved round mealy albumen. Herbs or shrubs 



Phytolaccacece, p. 387 



Perianth tubular, coloured. Herbs or undershrubs Lythrariece, p. 195 

 Carpels solitary or quite separate. 



Carpels several. Stamens hypogynous. Herbs or climb- 

 ing shrubs with petaloid sepals and very small de- 

 formed petals or none . - v . * Ranunculacece, p. 1 

 Carpel solitary. 



Anthers with recurved valves. Evergreen or deciduous 



trees or shrubs . . . '-' Lauracea, p. 392 

 Perianth tubular, coloured, hardened at the base. Herbs 



Nyctaginaccce, p. 385 



