24 ANALYTICAL KEY. 



Ovary 2 - sereral-celled. 

 Flowers irregular. 

 Anthers opening at the top, 



Six or eight and 1-celled : ovary 2-celled. . . PoLTOALACEa;, 120 

 Ten and 2-celled : ovary 5-celled. . . Rhodora, in Ericace^, 286 

 Anthers opening lengthvpise. 



Stamens 12 and petals 6 on the throat of a tubu- 

 lar inflated or gibbous calyx. Cuphea, in LrtHBACE^, 182 

 Stamens 5 - 8 or 10, and petals hypogynous, or nearly so. 



Ovary 3-celled SapindaCe^, 116 



Ovary 5-celled. . . • ' Impatiens, &c. in Gebaniaceje, 105 

 Flowers regular or nearly so. 



Stamens neither just as many nor twice- as many as petals, 



Triadelphous r petals 5. ■ HypEEicACEa), 83 



Tetradynamous (or rarely only 2 or 4) : petals 4: 



pungent herbs CRUciPEKiE, 62 



Distinct and fewer than the 4 petals. . . . Oleacejs, 400 

 Distinct and more numerous than the petals. . Sapindace/E, 116 

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

 Ovules and seeds only 1 or 2 in each cell. 

 Herbs : flowers monoecious or dioecious. EuPHOEBlACEa;, 430 



Herbs: flowers "perfe'ct and symmetrical. 

 Cells of the ovary as many as the sepals, &c. GERANiACEa:, 105 

 Cells of the Ovary (divided) twice as many as 



the styles, sepals, &c Linaceje, 104 



Shrubs or trees. 

 Leaves 3-foliolate, pellucid-punctate. Ptelea, in Rutace.^!, 109 

 Leaves palmately veined : fruit 2-winged. Sapindace.e, 116 



Leaves pinnately veined, simple, not punctate. 

 Calyx not minute : pod colored, dehiscent ; 



seeds enclosed in a pulpy aril. CELASTRACE.a), 115 



Calyx minute : fruit a berry-like drupe. AQniFOLiAOEa:, 305 

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

 Stipules between the opposite and simple leaves. Elatinace^e, 86 

 Stipules between the opposite and compound leaves 



(but they are caducous). Staphylea, in Sapindaoe^, 116 

 Stipules none when the leaves are opposite. 

 Stamens 5, monadelphous in a 10-toothed tube 



or cup : leaves simple, all radical. Galaoine.s;, 305 



Stamens 10, monadelphous at the base. Leaf- 

 lets 3, inversely heart-shaped. Oxalis in Gekaniace^, 105 

 Stamens distinct, free from the calyx. 



Style 1, undivided. EEiOAOEa;, 286 



Styles 2-5, separate. . . . CAETOPHYLLACEa), 87 



Stamens distinct, inserted on the calyx. 

 Styles 2 (or 3), or -splitting into 2 in fruit. Saxipeagace^, 163 

 Style 1 : pod in the calyx, 1-celled at maturity. Ltthraceje, 182 



