KEY TO THE ORDERS 



Anthers opening by slits. 

 Stigmas or styles distinct and cleft, or foliaceous, 



or united by pairs. Order Geraniales. 192 



Stigmas or styles all distinct or all united, neither 

 cleft nor foliaceous. 

 Stamens 2. Oleaceae in Order Gextianales. 245 

 Stamens more than 2. 



Leaves with compound blades. 



Families in Order Geraniales. 192 

 Leaves with simple blades. 

 Ovule solitary in each carpel. 

 Stj'les distinct : ovule pendulous. 



Families in Order Geraniales. 192 

 Styles united : ovule erect or ascending. 



Limnanthaceae in Order Sapindales. 201 

 Ovules 2 or more in each carpel. 

 Flowers irregular: stamens united at the 

 top or converging. 

 Placentae axile. 



Balsaminaceae in Order Geraniales. 192 

 Placentae pariental. 



Violaceae in Order Parietales. 210 

 Flowers regular : stamens neither united 

 nor converging at the top. 

 Carpels not circumscissile at maturity. 

 Placentae parietal. 



Cistaceae in Order Parietales. 210 

 Placentae a.xile or central. 

 Styles distinct. 



Elatinaceae in Order Parietales. 210 

 Styles united. 



Tiliaceae in Order Malvales. 208 

 Carpels circumscissile at maturity. 



Penthoraceae in Order Rosales. 157 

 gg. Stamens inserted on the margin of a disk or hypanthium 

 (perigj'nous or hypogynous). 

 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. 157 



Styles united. Order Rhamnales. 206 



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. 157 

 Upper part of the ovaries united. Order Sapindales. 201 



Styles united. 



Hypanthium flat or obsolete : disk fleshy. 

 Plants without oil-glands in the bark. 



Order Sapindales. 201 

 Plants with oil-glands in the bark. 



Families in Order Geraniales. 192 



