KEY TO THE OKDEES. XV 



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



or many. 

 Styles distinct. 



Upper part of the ovaries distinct, at least at maturity. 



Saxifragaceae in Order ROSALES. 



Upper part of the ovaries united. Order SAPINDALES. 



Styles united. 



Hypanthium flat or obsolete : disk fleshy. 



Plants without secreting glands in the bark. 



Order SAPINDALES. 

 Plants with secreting glands in the bark. 



Families in Order GERANIALES. 



Hypanthium cup-shaped or campanulate : disk obsolete or 

 inconspicuous. Order MYRTALES. 



ttOvary inferior. 



Stamens numerous. 



Styles and stigmas united into a disk : water-plants with endog- 

 enous stems. Nymphaeaceae in Order ROSALES. 

 Styles distinct, or united, but not forming a disk with radiating 



stigmas : land-plants with exogenous stems. 

 Styles distinct. Families in Order ROSALES. 



Styles united. 



Shrubs or trees ; not succulents, sometimes woody vines. 

 Hypanthium not produced beyond the ovary. 



Escalloniaceae in Order ROSALES. 

 Hypanthium produced beyond the ovary. 



Families in Order MYRTALES. 

 Herbs, or shrub-like or tree-like succulents. 



Order OPTJNTIALES. 

 Stamens not more than twice as many as the petals. 



Styles wanting : stigmas sessile. Gunneraceae in Order MYRTALES. 

 Styles present. 

 Styles distinct. 



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



or a fleshy many-seeded berry. 



Fruit, if dehiscent, valvate. Families in Order ROSALES. 

 Fruit circumscissile. 



Portulacaceae in Order CHENOPODIALES. 



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. 



Escalloniaceae in Order ROSALES. 

 Plants with tendrils. 



Herbs : fruit a pepo : leaf -blades palmately veined. 



Cucurbitaceae in Order CAMPANULALES. 

 Shrubby vines : fruit drupaceous, separating into nutlets : 

 leaf-blades pinnately veined. 



Rhamnaceae in Order RHAMNALES. 

 '* 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. 

 Filaments united. 



Stamens diadelphous. Fumariaceae in Order PAPAVERALES. 



Stamens monadelphous. 



Anther-sacs opening by slits. 



Oxalidaceae in Order GERANIALES. 

 Anther-sacs opening by pores. 



Calyx and corolla very irregular. Order POLYGALALES. 

 Calyx and corolla regular. Families in Order ERICALES, 

 Filaments distinct. 



Style wanting or very short : stigma sessile. 



Aquifoliaceae in Order SAPINDALES. 



Styles elongated. 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. 



