KEY TO THE OEDEKS 



Stamens not more than twice as many as the petals. 

 Styles distinct. 



Ovules several in each cavity of the ovary : fruit a capsule or 

 a fleshy many-seeded berry. Families in Order ROSALBS. 



Ovules solitary in each cavity of the ovary : fruit a drupe or 

 2-5 more or less united achenes. Order AMMIALES. 



Styles united, or single. 

 Plants without tendrils. 



Ovary enclosed in or surpassed by the hypanthium or adnate 



to it. 

 Anther-sacs opening by pores. 



Vacciniaceae in Order ERICALES. 

 Anther-sacs opening by slits. 



Ovules solitary in each cavity of the ovary. 



Order AMMIALES. 

 Ovules several in each cavity. 



Families in Order MYRTALES. 

 Ovary exceeding the hypanthium, the top free. 



Hydrangeaceae in Order ROSALES. 



Plants with tendrils. Rhamnaceae in Order RHAMXALES. 



Petals more or less united. 

 Ovary superior. 



Stamens free from the corolla. 



Gynoecium of a single carpel. Families in Order ROSALES. 



Gynoecium of several united carpels. 



Styles wanting or very short : stigma sessile. 



Aquifoliaceae in Order SAPINDALES. 



Styles elongate. Families in Order ERICALES. 



Stamens partially adnate to the corolla. 



Stamens as many as the lobes of the corolla and opposite them, or 



twice as many or more. Order EBENALES. 



Stamens as many as the lobes of the corolla and alternate with them, 



or fewer. 



Gynoecium of 3-6 carpels. Aquifoliaceae in Order SAPINDALES. 



Gynoecium of 2 carpels. 



Carpels distinct, except sometimes at the apex. 



Order ASCLEPIADALES. 

 Carpels united. 



Ovary 1-celled, with central placentae. Order GEXTIANALES. 

 Ovary 2-celled or falsely 4-celled, or if 1-celled with parietal 



placentae. 

 Stamens 2 and opposite each other, or 3. 



Order OLEALES. 

 Stamens usually 4 or 5, if 2 by reduction not opposite 



each other. 



Leaves with stipules or stipular lines at their bases. 

 Spigeliaceae in Order GENTIANALES. 

 Leaves with no traces of stipules. 



Order POLEMONIALES. 

 Ovary inferior. 



Stamens with the filaments free from the corolla. 



Stamens 10 : anther-sacs opening by terminal pores or chinks. 



Vacciniaceae in Order ERICALES. 

 Stamens 5 or fewer : anther-sacs opening by longitudinal slits. 



Order CAMPANULALES. 

 Stamens adnate to the corolla. 



Ovary with 2-many fertile cavities and 2-many ovules : calyx unmodi- 

 fied, at least not a pappus : flowers not in involucrate heads. 

 Ovules mostly on basal placentae : plants parasitic. 



Order SANTALALES. 



Ovules variously borne, but not on a basal placenta : plants not 



parasitic Order RUBIALES. 



Ovary with one fertile cavity : calyx a pappus of scales or bristles : 



flowers in involucrate heads. Order CARDDALES. 



