ANALYTICAL KEY 19 



Stipules none when the leaves are opposite. 

 Stamens 5, united at base into a 10-toothed 



cup or tube ; leaves all radical Galax, 642 



Stamens free from each other. 

 Style 1. 

 Stamens free from the calyx Ericaceae, 625 



Stamens inserted on the calyx Lythraceae, 591 



Styles 2-5, or splitting into 2 in fruit. 

 Stamens free from the calyx; leaves 



opposite Caryophyllaceae, .377 



Stamens inserted on the calyx Ericaceae, 625 



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



G. Tendril-bearing and often succulent herbs Cucurbitaceae, 764 



i G. Not tendril-bearing H. 



H. Ovules and seeds more than 1 in each cell. 

 Ovary 1-celled. 

 Sepals or calyx-lobes 2 ; ovules borne at the base of the 



ovary Portulacaceae, 387 



Sepals or calyx-lobes 4-5 ; placentae 2-3, parietal Saxifragaceae, 444 

 Ovary 2-many-celled. 

 Anthers opening by pores at the apex Melastomaceae, 593 



Anthers not opening by pores. 

 Stamens inserted on or about a flat disk which covers 



the ovary Celastraceae, 556 



' Stamens inserted on the calyx. 



Style 1 ; stamens 4 or 8 (rarely 5) Onagraceae, 594 



Styles 2-3, distinct ; stamens 5 or 10 Saxifragaceae, 444 



H. Ovules and seeds only 1 in each cell. 

 Stamens 5 or 10. 

 Trees or shrubs. 

 Leaves simple, not prickly Crataegus, 460 



Leaves compound, or prickly Araliaceae, 605 



Herbs. 



Fruit dry, splitting at maturity ; styles 2 Umbelliferae, 607 



Fruit berry-like ; styles 2-5, separate or united Araliaceae, 605 

 Stamens 2, 4, or 8. 

 Style and stigma 1 ; fruit a drupe Cornaceae, 623 



Styles or stigmatic branches or sessile stigmas usually 

 more than 1 ; fruit not drupaceous. 

 Shrubs or trees Hamamelidaceae, 452 



Herbs. 

 Style 1 ; stigma 2-4-lobed Onagraceae, 594 



Styles or sessile stigmas 4 Haloragidaceae, 602 



n. Petals more or less united I. 

 I. Stamens more numerous than the lobes of the corolla J. 

 J. Ovary 1-celled. 



Placenta 1, parietal Leguminosae, 499 



Placentae 2, parietal Fumariaceae, 416 



Placenta at the center or base of the ovary Styracaceae, 649 



J. Ovary 2-celled ; cells 1-ovuled Polygalaceae, 538 



J. Ovary 3-oc-celled K. 



K. Stamens free from the corolla. 



Style 1 ; leaves simple Ericaceae, 625 



Styles 5 1 leaves 3-foliolate Oxalidaceae, 532 



