KEY TO XATUEAL ORDERS. 



21 



Inserted on the corolla free from the stigma. p-age 

 Style none : stigmas 4 - 6 : corolla very 



short, deeply cleft. " Aqthfoliace^, 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. Borragixace^, 241 

 Ovary and pod 1-celled : the seeds 

 on the walls. 



Leaves entire and opposite. GEXTiAXACEiE, 260 

 Ovary and fi'uit with 2 or more cells. 

 Stamens 4. long. Flowers in a 



close spike. Plan-taginace^, 218 



Stamens 5. Pod or berry many- 

 seeded. 

 Flower not quite regular. 



Style entire. Scrophulariace^, 223 



Flower quite regular. Sta- 

 mens all alike. Solanace^, 250 

 Stamens 5. Pods with few 



large seeds. Twining herbs. Convolvulace^, 246 



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

 CoroUa more or less irregular, mostly 2-lipped. 



Ovary 4-lobed, making 4 akenes. Stems 



square ; leaves opposite, aromatic. • Labiat^e, 228 



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

 mens 4. YERBENACE.E, 228 



Ovary and pod 2-celled, with many large ] 

 and winged seeds. I -p 



Ovary and fruit irregularly 4 - 5-celled, with | i^iG^^^OXiACE^E, 220 

 many large seeds. J 



Ovary and pod 2-celled, with many or few 

 small seeds. Scrophulariace^, 223 



Corolla regular. Stamens only 2. 



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



