ANALYTICAL KEY. 



Sterile filaments or some appendages resem- 

 bling them before each veiny petal. 48 PARNASSIACEJB 

 No sterile filaments : style 1 or none. 45 CISTACEA:. 



Beset with strong bristles tipped with a clam- 

 my gland : styles divided so as to be 

 twice as many as the 3-5 placentae. 47 DROSERACE.S. 



Ovary 2 - several -celled. 

 Flowers irregular. 



Stamens diadelphous or monadelphous, 



Six or eight, connected with the corolla : anthers 



one-celled, opening at the top. ... 85 POLYGALACE.B. 

 Ten, free from the corolla : anthers 2-celled. (As- 

 tragalus, &c.) . . . . :' .;:;*< 88 LEGUMINOS.E. 

 Stamens 5, the anthers somewhat monadelphous or 



united over the stigma 73 (40) BALSAMINACE.K. 



Stamens distinct both as to the filaments and the anthers. 

 Anthers opening at the apex. , Khodora, 245 ERICACEAE. 



Anthers opening lengthwise. 



Calyx spurless. . ".- '".- . . .- 82 (41) SAPINDACE.E. 

 Calyx with a spur (except Cuphea, p. 127). (40) TROF.EOLACE.E. 

 Flowers regular or nearly so. 



Stamens (2 or 3) fewer than the 4 petals. . . . 356 (72) OLEACE.E. 



Stamens more numerous than the petals, but not twice as many, 

 Triadelphous : leaves opposite. . .... 48 HYPERICACE^E. 



Distinct, usually 6 or 8, of equal length. . . 84 (41 ) SAPINDACEJE. 

 Tetradynamous, i. e. 2 short and 4 long : petals 4. 28 (33) CROCIFER^:. 

 Stamens just as many or twice as many as the petals. 

 Ovules and seeds only 1 or 2 in each cell. 

 Herbs : flowers monoecious : styles fewer than the 



sepals, mostly 3. 385 EUPHORBIACE^E. 



Herbs : styles or stigmas as many as the petals or sepals. 



Sepals, petals, and lobes of the ovary 3 : stamens 6. 74 LIM.VANTHACE^J. 

 Sepals and petals 5 : ovary and pod 10-celled. 70 (38) LINAGES. 



Sepals, petals, and cells or lobes of the ovary 5 : 



stamens5-10. . ' . ' .. ' '. . 72 (38) GERANJACE.E. 

 Shrubs or trees. 



, Leaves palmately veined and lobed: fruit two- 



winged, a double samara. * ; :> ' Acer, 84 (41) SAPINDACE^:. 

 T eaves pinnately veined, not lobed. 



Calyx not minute : pod colored, dehiscent : 



seeds enclosed in a pulpy aril. ' * "". 81 CELASTRACE^. 

 Calyx minute : stigmas sessile : fruit a berry- 

 like drupe. -. -' '"'.- ' _'i- '";* v ' ' : i ? tlr --. 263 AQUIFOLIACE^E. 

 Ovules (and usually seeds) several or many in each cell. 



Stipules between the opposite and simple leaves. 52 ELATINACE^E 



