KEY TO NATURAL ORDERS. XI. 



Flower 2-merous; fruit mostly didymous, 



dry or drupaceous. KUBIAOBJE 165 



Corolla irregular; stamens 1 3; fruit an 



achene VALERIANE.E 167 



Flowers in dense heads; stamens 5; fruit 



an achene DIPSACE^E 167 



Shrubs with alternate leaves; anthers open- 

 ing by pores ERICACEAE 231 



Herbs with milky juice, campanulate or nar- 

 rower regular corolla, and many- 

 seeded capsule CAMPANULACE./E 229 



* * Stamens 35, united by their anthers. 



Corolla bilabiate; fruit capsular, many- 

 seeded . ...-.- LOBELIACE.E 228 



Corolla ligulate; fruit an achene; plants with 



milky juice and 12-sided pollen CICHORIACE^E 219 



Corollas ligulate or tubular; fruit an achene; 



plants with watery or gummy juice 



and spheroidal echinate pollen COMPOSITE 168 



Flowers unisexual; fruit fleshy, several-seeded; 



plants trailing or climbing by 



tendrils CUCURBITACE^E 143 



DIVISION IV. SYMPETAL^ HYPOGYN^. 



Corolla sympetalous, at least at base, the stamens attached to its tube 

 or base, the whole inserted arouud .the base of the (superior) ovary. 



A. Leaves opposite or whorled; corolla regular. 



* Fruit indehiscent. 



Trees with opposite leaves : fruit a samara OLEACE.E 239 



Herbs with unilateral spikes or racemes; fruit 



4 nutlets Allocarya in ASPERIFOLI^E 258 



* * Herbs with milky juice and follicular pods. 



Corolla not hooded within; anthers and 



stigma approximate APOCYNACE^ 240 



Corolla adorned within by a whorl of hood- 

 like appendages; anthers and 

 stigma united. ASCLEPIADACE.E 241 



* * * Fruit capsular. 



Stamens opposite the corolla-lobes; placenta 



central Anagallis in PRIMULAOB^: 238 



