KEY TO THE ORDERS. , ;,i 



Stamens more than 2. PAGE 



Leaves with compound blades. 



Families in Order GERANIALES. 65& 

 Leaves with simple blades. 



Ovule solitary in each carpel. 



Styles distinct: ovule pendulous. 



Families in Order GERANIALES. 658- 

 Styles united: ovule erect or ascending. 



Limnanthaceae in Order SAPINDALES. 723. 

 Ovules 2 or more in each carpel. 



Flowers irregular: stamens united at the top or 



converging. 

 Placentae axile. 



Balsaminaceae in Order GERANIALES. 658 

 Placentae parietal. 



Violaceae in Order HYPERICALES. 781 

 Flowers regular: stamens neither united nor 



converging at the top. 

 Carpels not circumscissile at maturity. 

 Placentae parietal. 



Cistaceae in Order HYPERICALES. 781 

 Placentae axile or central. 



Styles distinct. Elatinaceae in 



Order HYPERICALES. 781 

 Styles united. 



Ovary sessile: filaments filiform. 



Tiliaceae in Order MALVALES. 759 

 Ovary stipitate: filaments fusi- 

 form. Koeberliniaceae 



in Order GERANIALES. 658 

 Carpels circumscissile at maturity. 



Penthoraceae in Order ROSALES. 494 



t J Stamens inserted on the margin of a disk or hypanthiuin (perigynous or hypogynous) . 

 Stamens fewer than the sepals or the petals. 



Hippocrateaceae in Order SAPINDALES. 723. 

 Stamens as many as the sepals or the petals, or more. 

 Stamens as many as the petals and opposite them. 



Styles and upper part of the ovaries distinct: ovules and seeds many. 



Saxifragaceae in Order ROSALES. 49 

 Styles united. 



Ovules and seeds numerous. Moringaceae in Order PAPAVERALES. 459' 



Ovules and seeds solitary or 2. Order RHAMNALES. 747 



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 and Iteaceae in Order ROSALES. 494 



Upper part of the ovaries united. Order SAPINDALES. 723 



Styles united. 



Hypanthium flat or obsolete: disk fleshy. 



Plants without secreting glands in the bark. Order SAPINDALES. 723 



Plants with secreting glands in the bark. 



Families in Order GERANIALES. 658 

 Hypanthium cup-shaped or campanulate: disk obsolete or inconspicuous 



Order MYRTALES. 822 

 ft Ovary inferior. 



Stamens numerous. 



Styles and stigmas united into a disk: water-plants with endogenous stems. 



Nymphaeaceae in Order RANALES. 494 

 Styles distinct, or united, but not forming a disk with radiating stigmas: land-plants 



with exogenous stems. 

 Styles distinct. 



Stamens distinct: stigmas simple: shrubs or trees. 



Families in Order ROSALES. 494 



Stamens with united filaments: styles branched: herbs. Order BEGONIALES. 819 

 Styles united. 



Shrubs or trees, not succulents, sometimes woody vines. 

 Hypanthium not produced beyond the ovary. 



Hydrangeaceae in Order ROSALES. 494 



Hypanthium produced beyond the ovary. Families in Order MYRTALES. 822 

 Herbs, or shrub-like or tree-like succulents. Order OPUNTIALES. 808 



Stamens not more than twice as many as the petals. 



Styles wanting: stigmas sessile. Gunneraceae in Order MYRTALES. 822 



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. 494 



Fruit circumscissile. Portulacaceae in Order CHENOPODIALES. 383 



Ovules solitary in each cavity of the ovary: fruit a drupe or 2-5 more or less 



united achenes. Order AMMIALES. 851 



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. 876 



Anther-sacs opening by slits. 



Ovules solitary in each cavity of the ovary. Order AMMIALES. 851 



