Lutlroduction. XXIX 
Placentas axile. 
Styles distinct to the base. 
Calyx in a broken whorl, much imbricated. 
Stamens polyadelphous. Shrubs or herbs having oppo- 
site, usually dotted leaves, and yellow flowers 
Hypericinee, page 76 
Stamens monadelphous or free. 
Calyx slightly imbricated, sepals in a complete whorl. 
Each carpel with an hypogynous scale at its base. Suc- 
culent herbs with cymose flowers . Crassulacee, p. 188 
Carpels without hypogynous scales, 
Carpels two, diverging at the top Saxifragee, p. 178 
Carpels not diverging at the top. Herbs with oppo- 
site leaves and usually dichotomously cymose 
flowers : : : Caryophyllee, p. 62 
Styles more or less combined, gynobasie. 
Trees with deciduous unequally pinnate leaves and incon- 
spicuous flowers . : c : . Ailanthus, p. 98 
Styles wholly combined. 
Herbs, shrubs, or trees, usually having glandular eysts 
containing pungent juice, and hermaphrodite flowers 
Rutacre, ). 95 
Shrubs or trees with diccious or polygamous flowers 
Ptclea and Skinmia, p 96 97 
Styles divided at the top. Flowers irregular. Herbs, Zmpatiens, p. 94 
Styles more or less combined, not gynobasic. 
Calyx much imbricated ; sepals in a broken whorl. 
Flowers unsymmetrical. 
Flowers regular. 
Petals without appendages. Trees or shrubs 
with opposite deciduous leaves, polygamous 
often apetalous flowers, and a samaroid 
fruit. : . . ‘ Acerinee, p. 107 
Petals with or without appendages. Trees with 
compound deciduous leaves and showy 
flowers ‘ s é F Sapindce, p. 104 
Flowers papilionaceous (Pea-like). Herbs or under- 
shrubs with simple leaves; stamens united 
Pulygalee, p. 61 
Calyx only slightly imbricated, in a complete whorl. 
Carpels four or more. Anthers opening by pores. 
Evergreen or deciduous shrubs with small flowers 
Ericacee, p. 274 
Carpels four or more. Anthers opening by slits. 
Stamens unitedin a long tube. Trees with pinnate 
leaves and numerous small paniculate flowers, 
Meliacce, p. 98 
Stamens free or nearly so, Shrubs with alternate 
leaves having a winged jointed petiole and 
fragrant flowers. ‘ , F Citrus, p. 97 
Carpels fewer than four. 
Flowers hermaphrodite. 
