XU ANALYTIC KEY TO THE FAMILIES 



Calyx of 3 equal or 5 unequal lobes 



Cistacew, p. 89 

 GO. Ovary 2-several-celled. 

 Flowers irregular. 



Anthers opening by a pore at the top 



Polygalacece, p. 80 

 Anthers opening down the side 



BalsaminacetE, p. 84 

 Flowers regular. 



Stamens just as many or twice as many as the 

 petals. 

 Ovules 1 or 2 in a cell. 

 Herbs. 



Flowers unisexual . Euphorbiacece, p. 81 

 Flowers perfect. 



Cells of the ovary the same num- 

 ber as the sepals Geraniacece, p. 79 

 Cells of the ovary twice as many 



as the sepals . Linacew, p. 78 

 Shrubs or trees. 

 Leaves compound or palmately 



lobed Aceracece, p. 83 



Leaves simple, alternate ; a, climb- 

 ing shrub . . OBLASTRus, p. 82 

 Ovules several or many in a cell. 



Leaves compound, of three oboordate 



leaflets .... Oxalidacem, p. 78 

 Leaves simple. 



Style 1, stamens free from calyx. 



' Ericaceae, p. 100 



Styles 2 or 5 ; leaves opposite from 



swollen joints Caryophyllacece, p. 40 

 Stamens not just as many or twice as many 

 as the petals. 

 Trees or shrubs. 



Stamens fewer than the petals 



OleacecB, p. 107 

 Stamens more numerous than the 



petals Aceracece, p. 83 



EE. Calyx attached to the ovary for at least part of its 

 length. 

 Tendril-bearing, herbaceous vines Cucurbitaceoe, p. 132 

 Not tendril-bearing. ' 



Ovules more than 1 to a cell. 

 Ovary 1-celled ; sepals 2 . . Portulacacece, p. 43 



