Introduction. 



XXIX 



Placentas axile.. 



Styles distinct to the base. 



Calyx in a broken whorl, much imbricated. 



Stamens polyadelphous. Shrubs or herbs having oppo- 

 eite, usually dotted leaves, and yellow flowers 



HypericinccB, 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 . Crassulaccce, p. 188 

 Carpels without hypogynous scales. 



Carpels two, diverging at the top . Saxifrages, p. 178 



Carpels not diverging at the top. Herbs with oppo- 

 site leaves and usually dichotomously cymose 

 flowers . . . . Caryophyltea, p. 62 



Styles more or less combined, gynobasic. 



Trees with deciduous unequally pinnate leaves and incon- 

 spicuous flowers Attanthus, p. 98 



Styles wholly combined. 



Herbs, shrubs, or trees, usually having glandular cysts 

 containing pungent juice, and hermaphrodite flowers 



Rutacca, p. 95 

 Shrubs or trees with dioecious or polygamous flowers 



Ptclea and Skimmia, p. 96-97 



Styles divided at the top. Flowers irregular. Herbs, Impatiens, 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 Acerinea, p. 107 



Petals with or without appendages. Trees with 

 compound deciduous leaves and showy 

 flowers . ; . . . Sapindece, p. 104 

 Flowers papilionaceous (Pea-like). Herbs or under- 

 shrubs with simple leaves; stamens united 



Polygalea, 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 



Ericaccce, p. 274 



Carpels four or more. Anthers opening by slits. 

 Stamens united in a long tube. Trees with pinnate 

 leaves and numerous small paniculate flowers, 



Meliacca, p. 98 



Stamens free or nearly so. Shrubs with alternate 

 leaves having a winged jointed petiole and 

 fragrant flowers .... Citrut, p. 9? 



Carpels fewer than four. 

 Flowers hermaphrodite. 



