KEY TO THE ORDERS 



Stamens as many as the petals and opposite them. 

 Flowers monoecious. 



Euphorbiaceae in Order Euphorbiales. 

 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-celIed. 



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 Sarracexiales. 

 Stigmas brush-like. 



Turneraceae in Order Hypericales. 

 Anther witli 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 Htpericales. 

 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 Poiagalai.es. 

 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 Eupiiorbiales. 

 Stigmas or styles all distinct or all united, 

 neither cleft nor foliaceous. 

 Stamens 2. Oleaceae in Order Oleales. 

 Stamens more than 2. 



Leaves with compound blades. 



Families in Order Geraniai.es, 

 Leaves with simple blades. 



Ovule solitary in each carpel. 



Families in Order Geramai.bs. 

 Ovules 2 or more in each carpel. 

 Placentae parietal, 

 ristaceae 



in Order Htpericales. 

 Placentae axile or central. 

 Tlllaceae 



in Order Malvales. 

 JJStamens Inserted on the margin of a disk or hypanthium (perigynous 

 or hypogynous). 

 Stamens as many as the petals and ojjposUe them. 

 Ovules and seeds numerous. 



Moringaceae in Order Papaverales. 



Ovules and seeds solitary or 2. Order Riiamnales. 



.Stamens as many as the petals and alternate with (hem, or more 



or many. 



Styles distinct. Order Sapindales. 



Styles united. 



IIyi)anthinm flat or obsolete : disk fleshy. 



