X. KEY TO NATURAL ORDERS. 



* * Stamens 5 or 10 only. 



Corolla papilionaceous; fruit a legume. ........ LEGUMINOSS 83 



Corolla regular or nearly so; 



Calyx tubular; petals on its throat SAMCARIS 140 



Calyx campanulate; petals near the base. . .SAXIFRAGES 119 



B. Ovary mainly inferior. 

 * Stamens many, usually 20 or more. 



Woody plants; carpels 25; fruit a pome POMACES 110 



Succulent herbs; carpels several; fruit fleshy 



or capsular FICOIDES 128 



Herbs rough with short barbed hairs; ovary 



cylindric, wholly inferior LOASES 141 



Flowers apetalous, dioecious DATISCES 28 



* * Stamens few and definite. 



Calyx-limb obvious; flowers mostly 4-merous; 

 Fruit dry and capsular, or nut-like, or 



baccate EPILOBIACES 129 



Fruit fleshy and drupaceous CORNES 159 



Calyx-limb surpassing the tube; flowers 5-mer- 



ous; fruit baccate Ribes in SAXIFRAGES 123 



Calyx-limb 3-lobed; stamens 612 ARISTCXLOCHIACE.E 142 



Calyx-limb 5-toothed or obsolete; 



Stamens syngenecious CUCURBITACES 143 



Stamens distinct; 



Ovary more than 2-celled; fruit baccate ARALIACES 145 



Ovary 2 celled; fruit a pair of ribbed 



or winged or striate carpels UMBELLIFERS 145 



Apetalous aquatics; fruits nutlets HALORAGES 138 



DIVISION III. SYMPETAL.E PERIGYN^. 



Sepals united below into a tube adherent to the ovary. United corolla, 

 with adherent stamens, inserted on the calyx near its summit. 



* Stamens 110, distinct. 



Parasites with jointed stems, no petals, and a 



berry-like fruit . .LORANTHES 161 



Leafy terrestrial plants, with opposite or 

 whorled leaves, and small calyx- 

 limb; 

 Flowers 5-merous; fruit berry -like CAPRIFOLIACES 162 



