22 ANALYTICAL KEY. 



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



Ovary 3-celled. ... SAPIXDACE.E, 1 1 5 



Ovary 5 celled. . . Impatieus, &c., in GEEANIACE^:, 105 

 Flowers regular or nearly so. 



Stamens neither just as many iior twice as many as the petals, 



Triadelphous ; petals 5. . . HYPERICACE.E, 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 moncecious or dwecious. ECPHORBIACE^E, 451 



Herbs ; flowers perfect and symmetrical. 



Cells of the ovary as many as the sepals, &c. GERANIACE^;, 1 02 

 Cells of the (divided) ovary twice as many as 



the styles, sepals, &c. .... LINAGES, 101 

 Shrubs or trees. 



Leaves 3-foliolate, pellucid-punctate. Ptelea, in RUTACEJE, 107 

 Leaves palmately veined and fruit 2-wiuged, or 



pinnate and fruit a berry. . . . SAPINDACE.E, 115 

 Leaves pinuately veined, simple, not punctate. 

 Calyx not minute ; pod colored, dehiscent ; 



seeds enclosed in a pulpy aril. CELASTRACE^E, 109 



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



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



Stipules between the opposite and simple leaves. ELATINACE^E, 91 

 Stipules between the opposite and compound leaves 



(but they are caducous). Staphylea, in SAPINDACE.E, 118 

 Stipules none when the leaves are opposite. 



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



leaves simple, all radical. Galax, in DiAPENSiACE,E,326 

 Stamens 10, monadelphous at the base. Leaflets 3, 



inversely heart-shaped. Oxalis, in GERAXIACEJS, 105 



Stamens distinct, free from the calyx. 



Style 1, undivided ERICACEAE, 309 



Styles 2-5, separate. . . . CARYOPHYLLACE.E, 82 

 Stamens distinct, inserted on the calyx. 



Styles 2 (or 3), or splitting into 2 in fruit. SAXIFRAGACE.E, 168 

 Style 1 ; pod in the calyx, 1-celled. LYTHRACE^:, 184 



2. Calyx-tube adherent to the ovary, at least to its lower half. 

 Tendril-bearing and often succulent herbs. . . . CUCURBITACE.S:, 194 

 Not tendril-bearing. 



Ovules and seeds more than one in each cell. 



Ovary 1-celled, many-ovuled from the base. . . PORTCLACACE^;, 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^:, 183 



