KEY TO NATURAL OKDEKS. 21 



Inserted on the corolla free from the stigma. P^GB. 



Style none : stigmas 4 - 6 : corolla very 



short, deeply cleft. AQUIFOLIACE^E, 216 



Style 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. BORRAGINACE.E, 241 

 Ovary and pod 1 -celled : the seeds 

 on the walls. 



Leaves entire and opposite. GENTIAN ACEJJ, 260 

 Ovary and fruit with 2 or more cells. 

 Stamens 4, long. Flowers in a 



close spike. PLANTAGINACE^;, 218 



Stamens 5. Pod or berry many- 

 seeded. 

 Flower not quite regular. 



Style entire. SCROPHULARIACE.E, 223 



Flower quite regular. Sta- 



mens all alike. SOLANACEJS, 250 



Stamens 5. Pods with few 



large seeds. Twining herbs. CONVOLVULACEJJ;, 246 



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

 Corolla more or less irregular, mostly 2-lipped. 

 Ovary 4-lobed, making 4 akenes. Stems 



square ; leaves opposite, aromatic. LABIATE, 228 



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



mens 4. VERBENACEJE, 228 



Ovary and pod 2-celled, with many large ~) 



S3 



with 



many large seeds. 

 Ovary and pod 2-celled, with many or few 



small seeds. SCROPHULARIACE^E, 223 



Corolla regular. Stamens only 2. 



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



