12 KEY TO THE OKDKi;-< 



Leaves alternate, simple and compound. 



Stamens 5-10. Sapindacefe. 



Stamens (perfect) '2, opposite 2 of 5 petals. 



Sabiaceaa 



Serves III. Calycifloral. Flowers regular, mostly bisexual; calyx 

 inferior or superior; petals distinct, or connate at the very base only; disk 

 or very obscure ; stamens inserted in the limb of the calvx. 



(Tn the genera ami orders with inferior ovaries, the limb of the calyx is 

 often undeveloped, which character should refer them technically to the 

 apetalous division. Most of them will be found also iu that division. 

 Flowers bisexual or polygamous. 



Ovary superior (or half-superior in TrajM and Ficoidea- . 

 Herbs. 



Fruit a solitary follicle, leaves usually compound. 



Leguminosro. 



Fruits of small achenes, loaves compound. 



Rosacese. 

 Fruits drupaceous coriaceous. Haloragere. 



(Haloragis). 

 Fruits capsular. 



Sepals '?, embryo annular. TortulacaceiO. 

 Sepals 3-5. 



Aquatic herbs. Lytlirariea). 



Terrestrial herbs. 

 Leaves not carnose. Saxifrage SB. 

 Leaves carnoso. Crass ulacea) 

 Fruits indehiscent, 2-or 3- horned nuts, aquatic. 



Onagrariero. (Trapa\ 

 Trees or shrubs. 



Fruits of many small drupes, prickly shrubs, 



Rosace a). (Hub us). 

 Fruits various. 



Ovary 1-celled, (stylo single; leaves alternate 



