22 ANALYTICAL KEY. 



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



Ovary 3-celled Sapindace^, 115 



Ovary 5 celled. . . . Impatieus, &c., in Gekaniace^, 105 



Flowers regular or nearly so. 



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



Triadelphous ; petals 5 Hypericace^, 92 



Tetradynamous (or rarely only 2 or 4) ; petals 4 ; pun- 

 gent herbs. Crucifer.e, 61 



Distinct and fewer than the 4 petals. . . . Oleace^e, 335 

 Distinct and more numerous than the petals. . Sapindace^, 115 

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

 Ovules and seeds only 1 or 2 in each cell. 



Herbs; flowers monoecious or dioecious. Ecphorbiace^, 451 



Herbs ; flowers perfect and symmetrical. 



Cells of the ovary as many as the sepals, &c. Geraxiace^e, 102 

 Cells of the (divided) ovary twice as many as 



the styles, sepals, &c Linace.e, 101 



Shrubs or trees. 



Leaves 3-foliolate, pellucid-punctate. Ptelea, in Rutace^, 107 

 Leaves palmately veined and fruit 2-winged, or 



pinnate and fruit a berry. . . . SAPiNDACE.a:, 115 

 Leaves pinnately veined, simple, not punctate. 

 Calyx not minute ; pod colored, dehiscent ; 



seeds enclosed in a pulpy aril. Celastrace^, 109 



Calyx minute; fruit a berry -like drupe. iLiciNEiE, 107 



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



Stipules between the opposite and simple leaves. Elatinace^S), 91 

 Stipules between the opposite and compound leaves 



(but they are caducous). Staphylea, in SAPixDACEiE, 118 

 Stipules none when the leaves are opposite. 



Stamens 5, monadelphous in a 10-toothed tube or cup ; 



leaves simple, all radical. Galax, in DiAPExsiACEiE, 326 

 Stamens 10, monadelphous at the base. Leaflets 3, 



inversely heart-shaped. Oxalis, iu Geraxiace^, 105 



Stamens distinct, free from the calyx. 



Style 1, undivided Ericace^, 309 



Styles 2 - 5, separate. . . . Caryophyllace^, 82 



Stamens distinct, inserted on the calyx. 



Styles 2 (or 3), or splitting into 2 iu fruit. Saxifragace^, 168 

 Style 1 ; pod in the calyx, 1-celled. Lythrace.e, 184 



2. Cali/x-tuhe adherent to the ovary, at least to its loiver half. 

 Tendril-bearing and often succulent herbs. . . . Cdcurbitace^, 194 

 Kot tendril-bearing. 

 .Ovules and seeds more than one in each cell. 



Ovary 1-celled, many-ovuled from the base. . . Portulacaceje, 90 

 Ovary 1-celled, with 2 or 3 parietal placentae. . Saxifragace^e, 168 

 Ovary 2 - several-celled. 

 Anthers opening by pores at the apex; style 1. Melastomace.e, 183 



