KEY TO THE OEDEKS 



Flowers perfect. 



Ovules, or seeds, several or many : embryo coiled. 



Portulacaceae in Order Chenopodiales. 

 Ovules, or seeds, solitary : embryo straight. 



Plumbaginaceae in Order Primulales. 

 Stamens as many as the petals and alternate with them, or 

 more, sometimes twice as many. 

 Stamens 6 : petals 4 : sepals 2 or 4. 



Families in Order Papaverales. 

 Stamens, petals and sepals of the same number, or stamens 

 more, usually twice as many as the sepals or petals. 

 Ovary 1-celled. 



Ovules, or seeds, on basal or central placentae. 



Families in Order Chenopodiales. 

 Ovules, or seeds, on parietal placentae. 

 Stigmas 2-cleft or brush-like 



Anther with an inconspicuous connective. 

 Stigmas not brush-like. 

 ' Droseraceae in Order Sarraceniales. 



Stigmas brush-like. 



Turneraceae in Order Htpericales. 

 Anther with the conspicuous connective pro- 

 duced beyond the sacs. 



Papayaceae in Order Passiflorales. 

 Stigmas entire. 



Stamens with united filaments and no 

 staminodia. Families in Order Malvales. 

 Stamens with distinct filaments. 



Families in Order Hypericales. 

 Ovary several-celled. 



Stamens adnate to the gynoecium. 



Asclepiadaceae in Order Asclepiadales. 

 Stamens not adnate to the gynoecium. 



Stamens with wholly or partly united filaments. 

 Anthers opening lengthwise. 



Families in Order Geraniales. 

 Anthers opening by pores. 



Polygalaceae in Order Polygalales. 

 Stamens with distinct filaments. 

 Anthers opening by pores. 



Families In Order Ericales. 

 Anthers opening by slits. 



Stigmas or styles distinct and cleft, or 

 foliaceous, or united by pairs. 



Order Euphorbiales. 

 Stigmas or styles all distinct or all united, 

 neither cleft nor foliaceous. 

 Stamens 2. Oleaceae in Order Oleales. 

 Stamens more than 2. 



Leaves witli compound blades. 



Families in Order Geraniales. 

 Leaves with simple blades. 



Ovule solitary in each carpel. 



Families in Order Geraniales. 

 Ovules 2 or more in each carpel. 

 Placentae parietal. 

 Cistaceae 



in Order Hypericales. 

 Placentae axile or central. 

 Tiliaceae 



in Order Malvales, 

 ttStamens inserted on the margin of a disk or hypanthium (perigynous 

 or hypogynous). 

 Stamens as many as the petals and opposite them. 

 Ovules and seeds numerous. 



Moringaceae in Order Papaverales. 



Ovules and seeds solitary or 2. Order Rhamnales. 



Stamens as many as the petals and alternate with them, or more 



or manv. 



Styles distinct. Order Sapindales. 



Styles united. 



Hypanthium flat or obsolete : disk fleshy. 



Plants with secreting glands in the bark. 



Families in Order Geraniales. 



Hypanthium cup-shaped or campanulate : disk obsolete or 



inconspicuous. Order Myrtales. 



