KEY TO XATUllAL OKDEES. 



21 



Inserted on the corolla free from the stigma. pagb 

 Style none ; stigmas 4 - 6 : corolla very 



short, deeply cleft. Aq'jifoli agile, 216 



Stvle 1, rarely 2, sometimes 2-cleft or 3- 

 cleft. 



Ovary deeply 4-lobed, making 4 

 akenes. 



Stamens 4. Leaves opposite, 



aromatic. Labiate, 228 



Stamens 5. Leaves not aromatic. Boeragixace^, 241 

 Ovary and pod 1-celled : the seeds 

 on the walls. 



Leaves entire and opposite. Gexhanace^, 260 

 Ovary and fruit vrith 2 or more cells. 

 Stamens 4. long. Flowers in a 



close spike. Plaxtaginace^ 218 



Stamens 5. Pod or berry many- 

 seeded. 

 Flower not quite regular. 



Style entire. Scrophulariace^, 223 



Flower quite regular. Sta- 

 mens all alike. Solaxace^, 250 

 Stamens 5. Pods with few 



large seeds. Twining herbs. Coxvolvulace^, 246 



3. Slamens always fewer than the lobes of the calyx or corolla, 2-4. 

 Corolla more or less irregular, mostly 2-hpped. 



Ovary 4-lobed, making 4 akenes. Stems 



square ; leaves opposite, aromatic. Labla.t^, 228 



Ovary and fruit 4-celled and 4-seeded. Sta- 

 mens 4. Yerbexage^, 228 



Ovary and pod 2-celled, with many large "] 

 and winged seeds. 1 -p 



Ovary and fruit irregularly 4 - 5-ceUed, with \ J^i^^^'O^^-^CE^, 220 

 many large seeds. J 



Ovary and pod 2-celled, with many or few 

 small seeds. Scrophulartace^, 223 



CoroUa regular. Stamens only 2. 



Corolla 4-lobed or 4-parted. Shrubs or trees. Oleace^, 264 



